A227403 - cp's OEIS frontend

A227403 a(n) = Sum_{k=0..n} binomial(n^2, nk) binomial(n*k, k^2).

n	a(n)
0	1
1	2
2	14
3	1514
4	1308582
5	17304263902
6	1362702892177706
7	1323407909279927430346
8	11218363871234340925730020646
9	637467717878006909442727527733810142
10	519660435252919757259949810325837093364580014
11	2289503386759572781844843312201361014103189493095636611

[1, 2, 14, 1514, 1308582, 17304263902, 1362702892177706, 1323407909279927430346, 11218363871234340925730020646, 637467717878006909442727527733810142, 519660435252919757259949810325837093364580014, 2289503386759572781844843312201361014103189493095636611]

cp's OEIS Frontend

A227403 a(n) = Sum_{k=0..n} binomial(n^2, nk) binomial(n*k, k^2).

Table of values

List of values

cp's OEIS Frontend

A227403 a(n) = Sum_{k=0..n} binomial(n^2, n*k) * binomial(n*k, k^2).

Table of values

List of values

A227403 a(n) = Sum_{k=0..n} binomial(n^2, nk) binomial(n*k, k^2).