A246512 - cp's OEIS frontend

A246512 a(n) = (sum_{k=0}^{n-1}(3k^2+3k+1)C(n-1,k)^2C(n+k,k)^2)/n^3, where C(n,k) denotes the binomial coefficient n!/(k!*(n-k)!).

n	a(n)
1	1
2	8
3	87
4	1334
5	25045
6	529080
7	12076435
8	291307490
9	7325385345
10	190294925864
11	5074233846583
12	138240914882394
13	3834434331534781
14	107990908896551192
15	3081524055740420811
16	88938694296657330170
17	2592715751635344852505
18	76252823735941187830920
19	2260342454730542009915455
20	67476975730679069406101870

[1, 8, 87, 1334, 25045, 529080, 12076435, 291307490, 7325385345, 190294925864, 5074233846583, 138240914882394, 3834434331534781, 107990908896551192, 3081524055740420811, 88938694296657330170, 2592715751635344852505, 76252823735941187830920, 2260342454730542009915455, 67476975730679069406101870]

cp's OEIS Frontend

A246512 a(n) = (sum_{k=0}^{n-1}(3k^2+3k+1)C(n-1,k)^2C(n+k,k)^2)/n^3, where C(n,k) denotes the binomial coefficient n!/(k!*(n-k)!).

Table of values

List of values

cp's OEIS Frontend

A246512 a(n) = (sum_{k=0}^{n-1}(3k^2+3k+1)*C(n-1,k)^2*C(n+k,k)^2)/n^3, where C(n,k) denotes the binomial coefficient n!/(k!*(n-k)!).

Table of values

List of values

A246512 a(n) = (sum_{k=0}^{n-1}(3k^2+3k+1)C(n-1,k)^2C(n+k,k)^2)/n^3, where C(n,k) denotes the binomial coefficient n!/(k!*(n-k)!).