A384492 - cp's OEIS frontend

A384492 a(n) = n!^3 * Sum_{k=0..n} Stirling2(2k,k) Stirling2(2n-2k,n-k) / binomial(n,k)^3.

n	a(n)
0	1
1	2
2	113
3	38992
4	47071264
5	147015606528
6	988250901343488
7	12631667044878213120
8	280790763724247161061376
9	10147405862241529912885248000
10	565550513462476798468573003776000
11	46592777163703224212146175606784000000
12	5479872142880875751798643810680954683392000

[1, 2, 113, 38992, 47071264, 147015606528, 988250901343488, 12631667044878213120, 280790763724247161061376, 10147405862241529912885248000, 565550513462476798468573003776000, 46592777163703224212146175606784000000, 5479872142880875751798643810680954683392000]

cp's OEIS Frontend

A384492 a(n) = n!^3 * Sum_{k=0..n} Stirling2(2k,k) Stirling2(2n-2k,n-k) / binomial(n,k)^3.

Table of values

List of values

cp's OEIS Frontend

A384492 a(n) = n!^3 * Sum_{k=0..n} Stirling2(2*k,k) * Stirling2(2*n-2*k,n-k) / binomial(n,k)^3.

Table of values

List of values

A384492 a(n) = n!^3 * Sum_{k=0..n} Stirling2(2k,k) Stirling2(2n-2k,n-k) / binomial(n,k)^3.