A262280 - cp's OEIS frontend

A262280 Number of ways to select a nonempty subset s from an n-set and then partition s into blocks of equal size.

n	a(n)
0	0
1	1
2	4
3	11
4	29
5	72
6	190
7	527
8	1552
9	5031
10	18087
11	66904
12	266381
13	1164516
14	5215644
15	23868103
16	117740143
17	609872350
18	3268548406
19	18110463455
20	102867877414
21	620476915965
22	4005216028161
23	25747549921338
24	166978155172420
25	1168774024335203
26	8556355097320141

[0, 1, 4, 11, 29, 72, 190, 527, 1552, 5031, 18087, 66904, 266381, 1164516, 5215644, 23868103, 117740143, 609872350, 3268548406, 18110463455, 102867877414, 620476915965, 4005216028161, 25747549921338, 166978155172420, 1168774024335203, 8556355097320141]

cp's OEIS Frontend

A262280 Number of ways to select a nonempty subset s from an n-set and then partition s into blocks of equal size.

Table of values

List of values