A220688 - cp's OEIS frontend

A220688 T(n,k)=Number of ways to reciprocally link elements of an nXk array either to themselves or to exactly two horizontal, vertical or antidiagonal neighbors.

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	1
7	1
8	12
9	12
10	1
11	1
12	37
13	94
14	37
15	1
16	1
17	114
18	745
19	745
20	114
21	1
22	1
23	351
24	5851
25	15452
26	5851
27	351
28	1
29	1
30	1081
31	46027
32	312603
33	312603
34	46027
35	1081
36	1
37	1
38	3329
39	362057
40	6349886
41	15978924
42	6349886
43	362057
44	3329
45	1
46	1
47	10252
48	2847943
49	128995678

[1, 1, 1, 1, 4, 1, 1, 12, 12, 1, 1, 37, 94, 37, 1, 1, 114, 745, 745, 114, 1, 1, 351, 5851, 15452, 5851, 351, 1, 1, 1081, 46027, 312603, 312603, 46027, 1081, 1, 1, 3329, 362057, 6349886, 15978924, 6349886, 362057, 3329, 1, 1, 10252, 2847943, 128995678]

cp's OEIS Frontend

A220688 T(n,k)=Number of ways to reciprocally link elements of an nXk array either to themselves or to exactly two horizontal, vertical or antidiagonal neighbors.

Table of values

List of values