A118537 - cp's OEIS frontend

A118537 Number of functions f: {1, 2, ..., n} --> {1, 2, ..., n} such that f(1) != f(2), f(2) != f(3), ..., f(n-1) != f(n), f(n) != f(1).

n	a(n)
2	2
3	6
4	84
5	1020
6	15630
7	279930
8	5764808
9	134217720
10	3486784410
11	99999999990
12	3138428376732
13	106993205379060
14	3937376385699302
15	155568095557812210
16	6568408355712890640
17	295147905179352825840
18	14063084452067724991026

[2, 6, 84, 1020, 15630, 279930, 5764808, 134217720, 3486784410, 99999999990, 3138428376732, 106993205379060, 3937376385699302, 155568095557812210, 6568408355712890640, 295147905179352825840, 14063084452067724991026]

cp's OEIS Frontend

A118537 Number of functions f: {1, 2, ..., n} --> {1, 2, ..., n} such that f(1) != f(2), f(2) != f(3), ..., f(n-1) != f(n), f(n) != f(1).

Table of values

List of values