A354152 - cp's OEIS frontend

A354152 a(n) is the number of permutations pi in S_n such that pi(i) - i != 1 (mod n) and pi(i) - i != -1 (mod n) for all i.

n	a(n)
0	1
1	0
2	1
3	1
4	4
5	13
6	82
7	579
8	4740
9	43387
10	439794
11	4890741
12	59216644
13	775596313
14	10927434466
15	164806435783
16	2649391469060
17	45226435601207
18	817056406224418
19	15574618910994665
20	312400218671253764
21	6577618644576902053
22	145051250421230224306
23	3343382818203784146955

[1, 0, 1, 1, 4, 13, 82, 579, 4740, 43387, 439794, 4890741, 59216644, 775596313, 10927434466, 164806435783, 2649391469060, 45226435601207, 817056406224418, 15574618910994665, 312400218671253764, 6577618644576902053, 145051250421230224306, 3343382818203784146955]

cp's OEIS Frontend

A354152 a(n) is the number of permutations pi in S_n such that pi(i) - i != 1 (mod n) and pi(i) - i != -1 (mod n) for all i.

Table of values

List of values