A212599 - cp's OEIS frontend

A212599 Number of functions on n labeled points to themselves (endofunctions) such that the number of cycles of f that have each even size is even.

n	a(n)
0	1
1	1
2	3
3	18
4	160
5	1875
6	27126
7	466186
8	9275064
9	209654325
10	5307031000
11	148720701426
12	4570816040352
13	152874605142727
14	5527634477245440
15	214862754390554250
16	8934811701563214976
17	395788795274021394729
18	18606559519007667893376
19	925222631836457779380370
20	48518852386696450625510400

[1, 1, 3, 18, 160, 1875, 27126, 466186, 9275064, 209654325, 5307031000, 148720701426, 4570816040352, 152874605142727, 5527634477245440, 214862754390554250, 8934811701563214976, 395788795274021394729, 18606559519007667893376, 925222631836457779380370, 48518852386696450625510400]

cp's OEIS Frontend

A212599 Number of functions on n labeled points to themselves (endofunctions) such that the number of cycles of f that have each even size is even.

Table of values

List of values