A246460 - cp's OEIS frontend

A246460 a(n) = (sum_{k=0}^{n-1} (2k+1)C(n-1,k)^2C(n+k,k)^2)/n^2, where C(n,k) denotes the binomial coefficient n!/(k!(n-k)!).

n	a(n)
1	1
2	7
3	77
4	1211
5	23009
6	489035
7	11203765
8	270937315
9	6825612185
10	177559028087
11	4739821161173
12	129244697791951
13	3587524535220001
14	101099089948850323
15	2886373390151379397
16	83343790441133767475
17	2430567530705659113545
18	71508611747063572974095
19	2120357936904537499679125
20	63315310358625743871987019

[1, 7, 77, 1211, 23009, 489035, 11203765, 270937315, 6825612185, 177559028087, 4739821161173, 129244697791951, 3587524535220001, 101099089948850323, 2886373390151379397, 83343790441133767475, 2430567530705659113545, 71508611747063572974095, 2120357936904537499679125, 63315310358625743871987019]

cp's OEIS Frontend

A246460 a(n) = (sum_{k=0}^{n-1} (2k+1)C(n-1,k)^2C(n+k,k)^2)/n^2, where C(n,k) denotes the binomial coefficient n!/(k!(n-k)!).

Table of values

List of values

cp's OEIS Frontend

A246460 a(n) = (sum_{k=0}^{n-1} (2k+1)*C(n-1,k)^2*C(n+k,k)^2)/n^2, where C(n,k) denotes the binomial coefficient n!/(k!(n-k)!).

Table of values

List of values

A246460 a(n) = (sum_{k=0}^{n-1} (2k+1)C(n-1,k)^2C(n+k,k)^2)/n^2, where C(n,k) denotes the binomial coefficient n!/(k!(n-k)!).