A216799 - cp's OEIS frontend

A216799 Number of permutations of an n X 7 array with each element moving exactly one horizontally or vertically and without 2-loops.

n	a(n)
1	0
2	42
3	0
4	7676
5	0
6	1879040
7	0
8	489300384
9	0
10	129127695440
11	0
12	34175930646380
13	0
14	9050948918328308
15	0
16	2397326535775801848
17	0
18	634999208667955702740
19	0
20	168198450029830487388264
21	0
22	44552431219619052902569084
23	0

[0, 42, 0, 7676, 0, 1879040, 0, 489300384, 0, 129127695440, 0, 34175930646380, 0, 9050948918328308, 0, 2397326535775801848, 0, 634999208667955702740, 0, 168198450029830487388264, 0, 44552431219619052902569084, 0]

cp's OEIS Frontend

A216799 Number of permutations of an n X 7 array with each element moving exactly one horizontally or vertically and without 2-loops.

Table of values

List of values