A208408 - cp's OEIS frontend

A208408 T(n,k) is the number of n X k 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.

n	a(n)
1	1
2	2
3	2
4	5
5	15
6	5
7	15
8	182
9	187
10	15
11	51
12	2698
13	10682
14	2795
15	51
16	187
17	41914
18	658450
19	667478
20	43947
21	187
22	715
23	658450
24	40883360
25	163422914
26	42012698
27	700075
28	715
29	2795
30	10370330
31	2540446156
32	40039156736
33	40595679634
34	2646531062
35	11188907
36	2795

[1, 2, 2, 5, 15, 5, 15, 182, 187, 15, 51, 2698, 10682, 2795, 51, 187, 41914, 658450, 667478, 43947, 187, 715, 658450, 40883360, 163422914, 42012698, 700075, 715, 2795, 10370330, 2540446156, 40039156736, 40595679634, 2646531062, 11188907, 2795]

cp's OEIS Frontend

A208408 T(n,k) is the number of n X k 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.

Table of values

List of values