A207868 - cp's OEIS frontend

A207868 T(n,k)=Number of n X k nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal or vertical neighbor (colorings ignoring permutations of colors).

n	a(n)
1	1
2	1
3	1
4	2
5	4
6	2
7	5
8	34
9	34
10	5
11	15
12	500
13	2052
14	500
15	15
16	52
17	10900
18	278982
19	278982
20	10900
21	52
22	203
23	322768
24	68162042
25	455546040
26	68162042
27	322768
28	203
29	877
30	12297768
31	26419793726
32	1625686993918
33	1625686993918
34	26419793726
35	12297768
36	877

[1, 1, 1, 2, 4, 2, 5, 34, 34, 5, 15, 500, 2052, 500, 15, 52, 10900, 278982, 278982, 10900, 52, 203, 322768, 68162042, 455546040, 68162042, 322768, 203, 877, 12297768, 26419793726, 1625686993918, 1625686993918, 26419793726, 12297768, 877]

cp's OEIS Frontend

A207868 T(n,k)=Number of n X k nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal or vertical neighbor (colorings ignoring permutations of colors).

Table of values

List of values