A130639 - cp's OEIS frontend

A130639 Number of degree-2n permutations without even cycles and such that number of cycles of size 2k-1 is even (or zero) for every k.

n	a(n)
0	1
1	1
2	1
3	41
4	1121
5	80977
6	5073377
7	984765497
8	131026429249
9	45819745767329
10	9199822716980033
11	5303459200225973833
12	1646226697154555000993
13	1377111876294420026771441
14	574027598120143165861124641
15	675477754387947155701063431257
16	381022545331716847279242552317057

[1, 1, 1, 41, 1121, 80977, 5073377, 984765497, 131026429249, 45819745767329, 9199822716980033, 5303459200225973833, 1646226697154555000993, 1377111876294420026771441, 574027598120143165861124641, 675477754387947155701063431257, 381022545331716847279242552317057]

cp's OEIS Frontend

A130639 Number of degree-2n permutations without even cycles and such that number of cycles of size 2k-1 is even (or zero) for every k.

Table of values

List of values