|
| |
|
| A201724号 |
| nX3 0..4数组的行和列按字典顺序不减少，并且没有元素等于其自身的水平和垂直相邻数 |
|
1
|
|
|
|
20, 631, 19827, 499474, 9603489, 144262866, 1757594146, 17915547783, 156619023957, 1198133817532, 8153980411514, 50035648469991, 279906963092730, 1440489290975090, 6871449852708897, 30577097006475471, 127620952939695332
(列表;图表;参考;听;历史;文本;内部格式)
|
|
|
|
抵消
|
1,1
|
|
|
评论
|
|
|
|
链接
|
|
|
|
配方奶粉
|
经验：a（n）=（1143/13339406848768000000）*n^27+（34659/333485171219200000）*n*26-（305829/102610821913600000）*n ^25+（18786617/246265972592640000）*n ^24+（3958894117/102610821913600000）*n^23-（890060916037/1608242995200000）*n^22+（3883955751623/1314067442688000）*n=21+（15789034554253/19467655 81760000）*n^20-（43341713819681471/15162316646400000）*n^19+（11737791620928206489/4149686611200000）*n^18-（9354946607145085039/507183925248000）*n*17+631407928105381/134254568448000）*n^13+（461140646483326049588504801/5370182737920000）*n^12+（28265806624709228060073236461/259355416320000）*11-（225517503006047758355035572048823/4146866611200000）*n ^10+（90452907504811296149083077682639/56317311520000）*n^9-（303248138174968127916184659794719/8760449617920000）*n^8+（393637850170773012106697103526188929/6949395129600000）*n^7-（7869653987787486349645970604178160087/11292708560000）*n ^6+（1901252628397296031171310111143845105449/311680371562500000）*n 6832704864000）*n^3+（75783682547020727035019319582699319129/64314997065600）*n^2-（1510369517764017479305249768151297/1784742960）*n+2129912253933134417390679用于n>45
|
|
|
例子
|
n=3的一些解
..1..2..4....1..3..4....0..0..1....0..1..3....0..0..4....1..3..4....0..0..1
..2..2..2....3..1..4....1..3..3....0..2..3....0..4..4....2..1..1....1..3..4
..3..0..0....4..2..3....4..1..4....2..3..3....3..2..2....2..1..1....2..4..2
|
|
|
交叉参考
|
|
|
|
关键词
|
非n
|
|
|
作者
|
|
|
|
状态
|
经核准的
|
| |
|
|
