A023998 - cp's OEIS frontend

A023998 Number of block permutations on an n-set which are uniform, i.e., corresponding blocks have same size.

n	a(n)
0	1
1	1
2	3
3	16
4	131
5	1496
6	22482
7	426833
8	9934563
9	277006192
10	9085194458
11	345322038293
12	15024619744202
13	740552967629021
14	40984758230303149
15	2527342803112928081
16	172490568947825135203
17	12952575262915522547136
18	1064521056888312620947794
19	95305764621957309071404877

[1, 1, 3, 16, 131, 1496, 22482, 426833, 9934563, 277006192, 9085194458, 345322038293, 15024619744202, 740552967629021, 40984758230303149, 2527342803112928081, 172490568947825135203, 12952575262915522547136, 1064521056888312620947794, 95305764621957309071404877]

cp's OEIS Frontend

A023998 Number of block permutations on an n-set which are uniform, i.e., corresponding blocks have same size.

Table of values

List of values