A001785 - cp's OEIS frontend

A001785 Second-order reciprocal Stirling number (Fekete) a(n) = [[2n+4, n]]. The number of n-orbit permutations of a (2n+4)-set with at least 2 elements in each orbit. Also known as associated Stirling numbers of the first kind (e.g., Comtet).

n	a(n)
0	1
1	120
2	7308
3	303660
4	11098780
5	389449060
6	13642629000
7	486591585480
8	17856935296200
9	678103775949600
10	26726282654771700
11	1094862336960892500
12	46641683693715610500
13	2066075391660447667500
14	95122549872697437090000

[1, 120, 7308, 303660, 11098780, 389449060, 13642629000, 486591585480, 17856935296200, 678103775949600, 26726282654771700, 1094862336960892500, 46641683693715610500, 2066075391660447667500, 95122549872697437090000]

cp's OEIS Frontend

A001785 Second-order reciprocal Stirling number (Fekete) a(n) = [[2n+4, n]]. The number of n-orbit permutations of a (2n+4)-set with at least 2 elements in each orbit. Also known as associated Stirling numbers of the first kind (e.g., Comtet).

Table of values

List of values