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A219948型
使用右三角形和2 X 2平铺的7 X n矩形的平铺数。
2
1, 0, 6, 0, 92, 0, 2376, 5504, 71248, 253952, 2175992, 10140032, 72393152, 377186688, 2462850896, 13696293888, 85330361248, 489397951936, 2980753350440, 17385409283712, 104607950578584, 615347939509760, 3679860151206528, 21744078445007360, 129606354640045704
抵消
0,3
链接
阿洛伊斯·海因茨,n=0..500时的n,a(n)表
常系数线性递归的索引项,签名(4, 23, -80, 115, -454, -448, 14170, -29225, 7046, -146051, 588502, 846767, -3992062, -2604251, 5563402, 51185474, -68603352, -54073841, -158364404, 578867289, -174549722, 760215019, -1876828610, 149204601, -7282850020, 9226439666, 5199134488, 26926334975, -31896621428, -18394521038, -82151994152, 28473878368, -18476692408, 93062076382, -574037808, 70728329804, -90109498688, 37654878912, -94984995808, 44055137768, -44217857024, 44741808416, 3157624320, 7979568544, -1430120704, -6084576320, 6323347968, -1759063552, -178826240, 223708160, -307560448, 79364096, -26296320, 8060928, -393216).
配方奶粉
G.f.:见Maple程序。
例子
a(2)=6,因为一个7 X 2矩形有6个平铺,使用右三角形和2 X 2平铺:
.___. .___. .___. .___. .___. .___.
| . | | . | | ._| | . | | . | |_. |
|___| |___| |_| | |___| |___| | |_|
| . | | ._| |___| | . | |_. | |___|
|___| |_| | | . | |___| | |_| | . |
| ._| |___| |___| |_. | |___| |___|
|_| | | . | | . | | |_| | . | | . |
|___| |___| |___| |___| |___| |___|
MAPLE公司
gf:=-(65536*x^53-1146880*x^52+1056768*x^51-11173888*x^50-509952*x^49+33372672*x^48-46419968*x^47+225738880*x^46-47477504*x^45-389283328*x ^44+1604376704*x^43-193165168*x^42+1816657344*x ^41+843167448*x^40-573151812*x^39+310216464*x^38-11976005632*x ^37+6543273808*x^36-5367184032*x^35+9797996038*x|34+2933363944*x^33+6282799800*x^32-2982763584*x^31+85733812*x^30-8254807988*x^29+58758079*x^28-1538296008*x^27+1483118884*x^26+420789512*x^25+260.010263*x^24-408844686*x^23+666645661*x^22-78341234*x^21-34068549*x^20+45496788*x^19+25092255*x^18-16579172*x^17-6253012*x^16+4608446*x^15+354299*x^14-225506*x^13-189351*x^12+193666*x^11-51177*x^10+17850*x^9-15917*x^8+8086*x^7-18*x^6-566*x^5+161*x^4-56*x^3+17*x^2+4*x-1)/
(393216*x^55-8060928*x^54+26296320*x^53-79364096*x^52+307560448*x^51-223708160*x^50+178826240*x^49+1759063552*x^48-6323347968*x^47+6084576320*x^46+1430120704*x^45-797568544*x^44-315762430*x^43-4471808416*x*x^42+442217857024*x^41-440-54055137768*x^40+944)984995808*x^39-37654878912*x^38+90109498688*x^37-70728329804*x^36+574037808*x^35-93062076382*x^34+18476692408*x^33-284738783686*x^32+82151994152*x^31+18394521038*x^30+31896621428*x^29-26926334975*x^28-5199134488*x*^27-922643966*x^26+7282850020*x^25-149204601*x^24+1876828610*x^23-760215019*x^22+174549722*x^21-578289*x^20+1580 364404*x^19+54073841*x^18+68603352*x^17-511854747*x^16-5563402*x^15+2604251*x^14+3992062*x^13-846767*x^12-588502*x^11+146051*x^10-7046*x^9+29225*x^8-14170*x^7+448*x^6+454*x^5-115*x^4+80*x^3-23*x^2-4*x+1):
a: =n->系数(系列(gf,x,n+1),x,n):
seq(a(n),n=0..30);
交叉参考
关键词
非n
作者
阿洛伊斯·海因茨2012年12月1日
状态
经核准的