A001784 - cp's OEIS frontend

A001784 Second-order reciprocal Stirling number (Fekete) a(n) = [[2n+3, n]]. The number of n-orbit permutations of a (2n+3)-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	24
2	924
3	26432
4	705320
5	18858840
6	520059540
7	14980405440
8	453247114320
9	14433720701400
10	483908513388300
11	17068210823664000
12	632607429473019000
13	24602295329058447000
14	1002393959071727722500
15	42720592574082543120000

[1, 24, 924, 26432, 705320, 18858840, 520059540, 14980405440, 453247114320, 14433720701400, 483908513388300, 17068210823664000, 632607429473019000, 24602295329058447000, 1002393959071727722500, 42720592574082543120000]

cp's OEIS Frontend

A001784 Second-order reciprocal Stirling number (Fekete) a(n) = [[2n+3, n]]. The number of n-orbit permutations of a (2n+3)-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