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| A189146号 |
| 每个元素进行零次或一次骑士移动的n X 3数组排列数。 |
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1
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1, 4, 49, 569, 4372, 42689, 412189, 3988132, 38271921, 375573977, 3665309372, 35872284105, 350949375581, 3439343559628, 33682318930233, 330021363385529, 3233215326749252, 31680809629578289, 310402921706993341
(列表;图表;参考;听;历史;文本;内部格式)
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抵消
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1,2
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评论
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链接
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配方奶粉
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经验公式：a（n）=9*a（n-1）+48*a（n-2）-371*a（n3）+173*a（4-4）-4636*a（-n5）-21700*a（6-6）+321034*a（7-7）-26106*a a（n-15）-987233536*a（n-16）-98495866880*a（n-17）+227291122176*a+4090433287168*a（n-21）-8710999644160*a 84482203648（n-32）+3264721555816448（n-33）+9397359024799744（n-34）-32363504358916096*a（n-35）-14560459025809408*a 500906385408*a（n-45）-1092767223451222016*a（n-46）-1774519408253730816*a（n-47）+3781671287689052160*a a（n-56）-1152921504606846976*a（n-57）+5764607523034288*a（n-58）
经验：G.f.：-（1-8*x-53*x^2+336*x^3+134*x^4+2846*x^5+19852*x^6-260036*x^7+6880*x^8+1292304*x^9-4702832*x^10+63471872*x`11-41560704*x^12-709453568*x^13+1351929600*x`14-312804192*x^15-659457024*x*x^16+70691011072*x|^17-106136367104*x^18-132922614784*x^19+318303350784*x^20-2065904152576*x^21+3225670889472*x^22+10372375166976*x ^23-11884683280384*x ^24+821650128896*x ^25-70221817905152*x ^26-122303538593792*x ^27+41556965479200*x ^28+388617697755136*x ^29-4575675104768*x ^30+122123978801152*x ^31-134229549645824*x ^32-7331344765943808*x ^33-2581369716736000*x x ^34+28061409178812416*x ^35+30743 37254932480*x^36-27158215842070528*x^37+16916901758238720*x ^38-8637373579526144*x ^39-42490723492167680*x ^40-200005314030862336*x ^41+176918825432776704*x ^42+705725146060554240*x ^43-362309834634166272*x ^44-1007318127542796288*x ^45+222508717868843008*x×^46+1439135376433217536*x x ^49+2010997971109281792*x ^50-2011772027295236096*x^51+145522562959409152*x^52+53482455750246400*x^53+22517998136852480*x^54-288230376151711744*x^55+144115188075855872*x^56）/（-1+9*x+48*x^2-371*x^3+173*x^4-4636*x^5-21700*x^6+321034*x^7-261016*x^8-939316*x^9+8804712*x^10-89239632*x^11+89709648*x^12+830637056*x^13-2499914752*x^14+6390654336*x*x^15-987233536*x^16-98495866880*x^17+227291122176*x^18-22499119616*x ^19-574642074624*x ^20+4090433287168*x ^21-8710999644160*x ^22-9262792159232*x ^23+33961426997248*x ^24-59705619185664*x ^25+164268932415488*x ^26+206996041138176*x ^27-959952477028352*x ^28+148261211865088*x^29+225201818959872*x*^30-528765464084480*x ^31+2784482203648*x ^32+326421555816448*x*x ^33+9397359024799744*x ^34-3263504358916096*x ^35-145 60459025809408*x ^36+41205664512475136*x ^37-65070379105779712*x ^38+117763114509795328*x ^39-2680397606301952*x ^40+132124530591137792*x*41+236469835482005504*x ^42-130875868922563788*x ^43+38229881149227008*x ^44+1688786500906385408*x ^45-1092767223451222016*x ^46-1774519408253730816*x ^47+371287689052160*x ^48-21169996881199 1040*x^49-6414401302863806464*x^50+3737846953229156352*x^51+2510967898491584512*x^52+740560663725735936*x^53-44157794336771328*x^54+2508504992445366272*x*^55+54043195528445952*x^56-1152921504606846976*x^57+576460752303488*x^58）
渐进式：0.045707910845127735589456*9.7983760587433722777622517835675^n
（结束）
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例子
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针对4 X 3的一些解决方案：
..0..8..3....0..1..2....0..1..7....0..8..7....5..1..2....0..1..7....7..6..3
..2..9..6....8.11.10....3..4..6....3..9.10....8..9..0....8..4..5....2..4.10
..5..7..1…..6..7..3….5.2..9…11..2..1…6.7..3…11..2..3…1...0..9
..4.10.11....9..5..4....8.10.11....4..5..6....4.10.11....9.10..6....8..5.11
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交叉参考
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关键词
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非n
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作者
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状态
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经核准的
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