A130223 - cp's OEIS frontend

A130223 Number of partitions of n-set in which number of blocks of size 2k-1 is odd (or zero) for every k.

n	a(n)
0	1
1	1
2	1
3	5
4	8
5	42
6	117
7	541
8	2403
9	10485
10	65778
11	282262
12	2284493
13	9977853
14	97315935
15	450358629
16	4966934284
17	25167390922
18	298399576813
19	1693380647429
20	20784317362947
21	134137856170593
22	1658511579778364
23	12262539123056548
24	150144857708406161
25	1273792249691584593

[1, 1, 1, 5, 8, 42, 117, 541, 2403, 10485, 65778, 282262, 2284493, 9977853, 97315935, 450358629, 4966934284, 25167390922, 298399576813, 1693380647429, 20784317362947, 134137856170593, 1658511579778364, 12262539123056548, 150144857708406161, 1273792249691584593]

cp's OEIS Frontend

A130223 Number of partitions of n-set in which number of blocks of size 2k-1 is odd (or zero) for every k.

Table of values

List of values