A216800 - cp's OEIS frontend

A216800 T(n,k)=Number of permutations of an nXk array with each element moving exactly one horizontally or vertically and without 2-loops.

n	a(n)
1	0
2	0
3	0
4	0
5	2
6	0
7	0
8	2
9	2
10	0
11	0
12	6
13	0
14	6
15	0
16	0
17	10
18	8
19	8
20	10
21	0
22	0
23	22
24	0
25	88
26	0
27	22
28	0
29	0
30	42
31	32
32	292
33	292
34	32
35	42
36	0
37	0
38	86
39	0
40	1774
41	0
42	1774
43	0
44	86
45	0
46	0
47	170
48	128
49	7676
50	10140
51	10140
52	7676
53	128
54	170
55	0
56	0
57	342
58	0
59	39844
60	0
61	207408
62	0
63	39844
64	0
65	342
66	0
67	0
68	682
69	512
70	186996

[0, 0, 0, 0, 2, 0, 0, 2, 2, 0, 0, 6, 0, 6, 0, 0, 10, 8, 8, 10, 0, 0, 22, 0, 88, 0, 22, 0, 0, 42, 32, 292, 292, 32, 42, 0, 0, 86, 0, 1774, 0, 1774, 0, 86, 0, 0, 170, 128, 7676, 10140, 10140, 7676, 128, 170, 0, 0, 342, 0, 39844, 0, 207408, 0, 39844, 0, 342, 0, 0, 682, 512, 186996]

cp's OEIS Frontend

A216800 T(n,k)=Number of permutations of an nXk array with each element moving exactly one horizontally or vertically and without 2-loops.

Table of values

List of values