A364267 - cp's OEIS frontend

A364267 Total number of blocks in all set partitions of [n] such that each element is contained in a block whose index parity coincides with the parity of the element.

n	a(n)
0	0
1	1
2	2
3	5
4	9
5	24
6	55
7	169
8	454
9	1567
10	4823
11	18422
12	63609
13	265929
14	1014266
15	4595861
16	19143089
17	93286964
18	420483103
19	2189786125
20	10601936382
21	58688597511
22	303349005967
23	1776842374930
24	9754696729753
25	60223101819493
26	349624680839546
27	2267363687696309

[0, 1, 2, 5, 9, 24, 55, 169, 454, 1567, 4823, 18422, 63609, 265929, 1014266, 4595861, 19143089, 93286964, 420483103, 2189786125, 10601936382, 58688597511, 303349005967, 1776842374930, 9754696729753, 60223101819493, 349624680839546, 2267363687696309]

cp's OEIS Frontend

A364267 Total number of blocks in all set partitions of [n] such that each element is contained in a block whose index parity coincides with the parity of the element.

Table of values

List of values