A378409 - cp's OEIS frontend

A378409 a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(n,k) * binomial(nk,k) / ((n-1)k+1).

n	a(n)
0	1
1	0
2	1
3	5
4	73
5	1409
6	36601
7	1198798
8	47594289
9	2225255777
10	119896198381
11	7320401163591
12	499766786359501
13	37739036987427515
14	3123975386959740223
15	281348109008473891049
16	27391364013973766381281
17	2866934827195653717595713
18	321048532728871544387444869
19	38303867032042004479765603315

[1, 0, 1, 5, 73, 1409, 36601, 1198798, 47594289, 2225255777, 119896198381, 7320401163591, 499766786359501, 37739036987427515, 3123975386959740223, 281348109008473891049, 27391364013973766381281, 2866934827195653717595713, 321048532728871544387444869, 38303867032042004479765603315]

cp's OEIS Frontend

A378409 a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(n,k) * binomial(nk,k) / ((n-1)k+1).

Table of values

List of values

cp's OEIS Frontend

A378409 a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(n,k) * binomial(n*k,k) / ((n-1)*k+1).

Table of values

List of values

A378409 a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(n,k) * binomial(nk,k) / ((n-1)k+1).