A222842 - cp's OEIS frontend

A222842 T(n,k) is the number of n X k 0..3 arrays with no more than floor(n*k/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.

n	a(n)
1	1
2	1
3	1
4	2
5	8
6	2
7	11
8	105
9	105
10	11
11	34
12	1585
13	4797
14	1585
15	34
16	131
17	23107
18	326408
19	326408
20	23107
21	131
22	438
23	353631
24	15364848
25	70144361
26	15364848
27	353631
28	438
29	2150
30	5338646
31	1077545438
32	15371324917
33	15371324917
34	1077545438
35	5338646
36	2150
37	7676

[1, 1, 1, 2, 8, 2, 11, 105, 105, 11, 34, 1585, 4797, 1585, 34, 131, 23107, 326408, 326408, 23107, 131, 438, 353631, 15364848, 70144361, 15364848, 353631, 438, 2150, 5338646, 1077545438, 15371324917, 15371324917, 1077545438, 5338646, 2150, 7676]

cp's OEIS Frontend

A222842 T(n,k) is the number of n X k 0..3 arrays with no more than floor(n*k/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.

Table of values

List of values