A384472 - cp's OEIS frontend

A384472 a(n) = Sum_{k=0..n} binomial(n,k)^3 * Stirling2(2k,k) Stirling2(2n-2k,n-k).

n	a(n)
0	1
1	2
2	22
3	558
4	25506
5	1770300
6	166190354
7	19647687682
8	2798281247682
9	466166725448544
10	88942246964278060
11	19127775950813311232
12	4578817457796314714502
13	1207681779462031251096888
14	348018457509475159702959174
15	108798555057988053563408904750
16	36676526343321856806298038370210

[1, 2, 22, 558, 25506, 1770300, 166190354, 19647687682, 2798281247682, 466166725448544, 88942246964278060, 19127775950813311232, 4578817457796314714502, 1207681779462031251096888, 348018457509475159702959174, 108798555057988053563408904750, 36676526343321856806298038370210]

cp's OEIS Frontend

A384472 a(n) = Sum_{k=0..n} binomial(n,k)^3 * Stirling2(2k,k) Stirling2(2n-2k,n-k).

Table of values

List of values

cp's OEIS Frontend

A384472 a(n) = Sum_{k=0..n} binomial(n,k)^3 * Stirling2(2*k,k) * Stirling2(2*n-2*k,n-k).

Table of values

List of values

A384472 a(n) = Sum_{k=0..n} binomial(n,k)^3 * Stirling2(2k,k) Stirling2(2n-2k,n-k).