A000907 - cp's OEIS frontend

A000907 Second-order reciprocal Stirling number (Fekete) a(n) = [[2n+2, n]]. The number of n-orbit permutations of a (2n+2)-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)
1	6
2	130
3	2380
4	44100
5	866250
6	18288270
7	416215800
8	10199989800
9	268438920750
10	7562120816250
11	227266937597700
12	7262844156067500
13	246045975136211250
14	8810836639999143750
15	332624558868351750000
16	13205706717164131170000

[6, 130, 2380, 44100, 866250, 18288270, 416215800, 10199989800, 268438920750, 7562120816250, 227266937597700, 7262844156067500, 246045975136211250, 8810836639999143750, 332624558868351750000, 13205706717164131170000]

cp's OEIS Frontend

A000907 Second-order reciprocal Stirling number (Fekete) a(n) = [[2n+2, n]]. The number of n-orbit permutations of a (2n+2)-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