A075852 - cp's OEIS frontend

A075852 Number of permutations s of {1,2,...,n} such that |s(i)-i|>3 for each i=1,2,...,n.

n	a(n)
0	1
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	1
9	16
10	436
11	6984
12	114124
13	1799688
14	29125117
15	486980182
16	8490078104
17	154750897552
18	2951968964768
19	58917663227568
20	1229367602071416
21	26787823838035750
22	608794318333169289
23	14411810690642972432

[1, 0, 0, 0, 0, 0, 0, 0, 1, 16, 436, 6984, 114124, 1799688, 29125117, 486980182, 8490078104, 154750897552, 2951968964768, 58917663227568, 1229367602071416, 26787823838035750, 608794318333169289, 14411810690642972432]

cp's OEIS Frontend

A075852 Number of permutations s of {1,2,...,n} such that |s(i)-i|>3 for each i=1,2,...,n.

Table of values

List of values