A262321 - cp's OEIS frontend

A262321 Number of ways to select a subset s containing n from {1,...,n} and then partition s into blocks of equal size.

n	a(n)
0	1
1	1
2	3
3	7
4	18
5	43
6	118
7	337
8	1025
9	3479
10	13056
11	48817
12	199477
13	898135
14	4051128
15	18652459
16	93872040
17	492132207
18	2658676056
19	14841915049
20	84757413959
21	517609038551
22	3384739112196
23	21742333893177
24	141230605251082
25	1001795869162783
26	7387581072984938

[1, 1, 3, 7, 18, 43, 118, 337, 1025, 3479, 13056, 48817, 199477, 898135, 4051128, 18652459, 93872040, 492132207, 2658676056, 14841915049, 84757413959, 517609038551, 3384739112196, 21742333893177, 141230605251082, 1001795869162783, 7387581072984938]

cp's OEIS Frontend

A262321 Number of ways to select a subset s containing n from {1,...,n} and then partition s into blocks of equal size.

Table of values

List of values