A198715 - cp's OEIS frontend

A198715 T(n,k)=Number of nXk 0..3 arrays with values 0..3 introduced in row major order and no element equal to any horizontal or vertical neighbor.

n	a(n)
1	1
2	1
3	1
4	2
5	4
6	2
7	5
8	25
9	25
10	5
11	14
12	172
13	401
14	172
15	14
16	41
17	1201
18	6548
19	6548
20	1201
21	41
22	122
23	8404
24	107042
25	250031
26	107042
27	8404
28	122
29	365
30	58825
31	1749965
32	9548295
33	9548295
34	1749965
35	58825
36	365
37	1094
38	411772
39	28609241
40	364637102
41	851787199
42	364637102

[1, 1, 1, 2, 4, 2, 5, 25, 25, 5, 14, 172, 401, 172, 14, 41, 1201, 6548, 6548, 1201, 41, 122, 8404, 107042, 250031, 107042, 8404, 122, 365, 58825, 1749965, 9548295, 9548295, 1749965, 58825, 365, 1094, 411772, 28609241, 364637102, 851787199, 364637102]

cp's OEIS Frontend

A198715 T(n,k)=Number of nXk 0..3 arrays with values 0..3 introduced in row major order and no element equal to any horizontal or vertical neighbor.

Table of values

List of values