搜索: 编号:a368957
|
|
A368957型
|
| (1/x)*系列的扩展_版本(x*(1-x^2/(1-x))^2)。 |
|
+0 5
|
|
|
1, 0, 2, 2, 13, 28, 127, 376, 1522, 5210, 20403, 74952, 292313, 1114704, 4371839, 17040586, 67378981, 266402370, 1061919289, 4241539218, 17030430061, 68554148388, 276988107861, 1121954081852, 4557637048543, 18556386241468, 75729621399950
(列表;图表;参考;听;历史;文本;内部格式)
|
|
|
抵消
|
0, 3
|
|
链接
|
|
|
配方奶粉
|
a(n)=(1/(n+1))*Sum_{k=0..floor(n/2)}二项式(2*n+k+1,k)*binominal(n-k-1,n-2*k)。
带递归的D-有限2000*n*(48911424697856946605*n-85862091501967897127)*(2*n+1)*(2-n-1)*(n+1)*a(n)+20*n*+6*(-1056620466555214160730036*n^5+5240184994626612582867927*n^4-10842595636486250859803566*n^3+1255580026362324081669713*n^2-83284982567955107408998*n+2408908212964334471344960)*a(n-2)+(-11765946248792266809360721*n^5+111908835475719217483707009*n^4-409273054609037480568616913*n^3+706828511197147489881004671*n^2-556027737885029117618846*n+1450055258917734060720)*a(n-3)+12*(110108843793156901781209*n^5-1706708924562157727758594*n^4+10728825545391547292463142*n^3-34121900584137543620498771*n^2+5476644856881278848844*n-35381689886652975706836240)*a(n-4)-36*(3*n-11)*(n-4 11575)*a(n-5)=0-R.J.马塔尔2024年1月25日
|
|
黄体脂酮素
|
(PARI)我的(N=30,x='x+O('x^N));Vec(倒转(x*(1-x^2/(1-x))^2)/x)
(PARI)a(n,s=2,t=2,u=-2)=和(k=0,n,二项式(t*(n+1)+k-1,k)*二项式;
|
|
交叉参考
|
|
|
关键字
|
非n
|
|
作者
|
|
|
状态
|
经核准的
|
|
|
搜索在0.005秒内完成
|