A377246 - cp's OEIS frontend

A377246 a(n) = (n!^2n^(n-1)/4) Sum_{k=4..n} A000276(k) / (n^k * (n-k)!).

n	a(n)
1	0
2	0
3	0
4	108
5	25200
6	6566400
7	2263917600
8	1070863718400
9	695561049469440
10	612326076235776000
11	716999439503394432000
12	1094463733944478334976000
13	2136344904330981293005056000
14	5240068882948994816402679398400
15	15901807526128013295439617984000000
16	58888414506334327924778872791367680000
17	262906951354695579633857525111586324480000

[0, 0, 0, 108, 25200, 6566400, 2263917600, 1070863718400, 695561049469440, 612326076235776000, 716999439503394432000, 1094463733944478334976000, 2136344904330981293005056000, 5240068882948994816402679398400, 15901807526128013295439617984000000, 58888414506334327924778872791367680000, 262906951354695579633857525111586324480000]

cp's OEIS Frontend

A377246 a(n) = (n!^2n^(n-1)/4) Sum_{k=4..n} A000276(k) / (n^k * (n-k)!).

Table of values

List of values

cp's OEIS Frontend

A377246 a(n) = (n!^2*n^(n-1)/4) * Sum_{k=4..n} A000276(k) / (n^k * (n-k)!).

Table of values

List of values

A377246 a(n) = (n!^2n^(n-1)/4) Sum_{k=4..n} A000276(k) / (n^k * (n-k)!).