A173500 - cp's OEIS frontend

A173500 Number of sequences of length n with terms from {0,1,...,n-1} such that the sum of terms is 0 modulo n and the i-th term is not i or 2i modulo n.

n	a(n)
1	0
2	0
3	0
4	6
5	64
6	854
7	13392
8	244944
9	5124266
10	120795956
11	3169804000
12	91666666668
13	2897010809280
14	99350833566282
15	3674884626652666
16	145845089585448960
17	6182031393612132352
18	278750799336055446646
19	13322922112485213149376

[0, 0, 0, 6, 64, 854, 13392, 244944, 5124266, 120795956, 3169804000, 91666666668, 2897010809280, 99350833566282, 3674884626652666, 145845089585448960, 6182031393612132352, 278750799336055446646, 13322922112485213149376]

cp's OEIS Frontend

A173500 Number of sequences of length n with terms from {0,1,...,n-1} such that the sum of terms is 0 modulo n and the i-th term is not i or 2i modulo n.

Table of values

List of values