A130278 - cp's OEIS frontend

A130278 Number of degree-n permutations such that number of cycles of size 2k-1 is odd (or zero) for every k.

n	a(n)
0	1
1	1
2	1
3	6
4	17
5	100
6	529
7	3766
8	31121
9	276984
10	2755553
11	29665306
12	364627801
13	4639937380
14	64952094401
15	973467571350
16	15750475301921
17	264870218828656
18	4759194994114369
19	90124395399063730
20	1812001488739061417
21	37956199941196210716
22	832297726351555617569

[1, 1, 1, 6, 17, 100, 529, 3766, 31121, 276984, 2755553, 29665306, 364627801, 4639937380, 64952094401, 973467571350, 15750475301921, 264870218828656, 4759194994114369, 90124395399063730, 1812001488739061417, 37956199941196210716, 832297726351555617569]

cp's OEIS Frontend

A130278 Number of degree-n permutations such that number of cycles of size 2k-1 is odd (or zero) for every k.

Table of values

List of values