A224271 - cp's OEIS frontend

A224271 Number of set partitions of {1,2,...,n} such that the element 1 is in an odd-sized block.

n	a(n)
1	1
2	1
3	3
4	8
5	28
6	107
7	459
8	2151
9	10931
10	59700
11	348146
12	2155925
13	14112377
14	97266301
15	703484851
16	5323515156
17	42040470092
18	345670438963
19	2953171501547
20	26166317121747
21	240047041176843
22	2276607815242880
23	22290187889601330
24	225018607554567149
25	2339331996135377345

[1, 1, 3, 8, 28, 107, 459, 2151, 10931, 59700, 348146, 2155925, 14112377, 97266301, 703484851, 5323515156, 42040470092, 345670438963, 2953171501547, 26166317121747, 240047041176843, 2276607815242880, 22290187889601330, 225018607554567149, 2339331996135377345]

cp's OEIS Frontend

A224271 Number of set partitions of {1,2,...,n} such that the element 1 is in an odd-sized block.

Table of values

List of values