A260884 - cp's OEIS frontend

A260884 Number of set partitions of a 2n-set into even blocks which have even length minus the number of partitions into even blocks which have odd length.

n	a(n)
0	1
1	-1
2	2
3	-1
4	-43
5	254
6	4157
7	-70981
8	-1310398
9	40933619
10	1087746617
11	-43668096946
12	-1926040182823
13	74089958942999
14	6019198050509282
15	-160614025972447321
16	-28821072878928603043
17	164386116957516330494
18	190177688405403480505877
19	5097857816569586800024019

[1, -1, 2, -1, -43, 254, 4157, -70981, -1310398, 40933619, 1087746617, -43668096946, -1926040182823, 74089958942999, 6019198050509282, -160614025972447321, -28821072878928603043, 164386116957516330494, 190177688405403480505877, 5097857816569586800024019]

cp's OEIS Frontend

A260884 Number of set partitions of a 2n-set into even blocks which have even length minus the number of partitions into even blocks which have odd length.

Table of values

List of values