A378326 - cp's OEIS frontend

A378326 a(n) = Sum_{k=0..n} binomial(n-1,k-1) * binomial(nk,k) / ((n-1)k+1).

n	a(n)
0	1
1	1
2	3
3	19
4	219
5	3901
6	95838
7	3022909
8	116798643
9	5350403737
10	283728025998
11	17104314563843
12	1155635807408096
13	86513627563199279
14	7109252862969177287
15	636268582522962837475
16	61610670571434193189443
17	6418044336586421956746033
18	715718717341021991299583730

[1, 1, 3, 19, 219, 3901, 95838, 3022909, 116798643, 5350403737, 283728025998, 17104314563843, 1155635807408096, 86513627563199279, 7109252862969177287, 636268582522962837475, 61610670571434193189443, 6418044336586421956746033, 715718717341021991299583730]

cp's OEIS Frontend

A378326 a(n) = Sum_{k=0..n} binomial(n-1,k-1) * binomial(nk,k) / ((n-1)k+1).

Table of values

List of values

cp's OEIS Frontend

A378326 a(n) = Sum_{k=0..n} binomial(n-1,k-1) * binomial(n*k,k) / ((n-1)*k+1).

Table of values

List of values

A378326 a(n) = Sum_{k=0..n} binomial(n-1,k-1) * binomial(nk,k) / ((n-1)k+1).