A184376 - cp's OEIS frontend

A184376 T(n,k)=1/3 the number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically.

n	a(n)
1	21
2	153
3	153
4	1107
5	2755
6	1107
7	8019
8	49235
9	49235
10	8019
11	58077
12	880781
13	2167173
14	880781
15	58077
16	420633
17	15754461
18	95528423
19	95528423
20	15754461
21	420633
22	3046491
23	281803871
24	4210059673
25	10378244309
26	4210059673
27	281803871
28	3046491
29	22064643

[21, 153, 153, 1107, 2755, 1107, 8019, 49235, 49235, 8019, 58077, 880781, 2167173, 880781, 58077, 420633, 15754461, 95528423, 95528423, 15754461, 420633, 3046491, 281803871, 4210059673, 10378244309, 4210059673, 281803871, 3046491, 22064643]

cp's OEIS Frontend

A184376 T(n,k)=1/3 the number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically.

Table of values

List of values