A251145 - cp's OEIS frontend

A251145 Number of (n+1) X (4+1) 0..2 arrays with every 2 X 2 subblock summing to 4 and no 2 X 2 subblock having exactly two nonzero entries.

n	a(n)
1	107
2	161
3	247
4	401
5	667
6	1141
7	1987
8	3521
9	6327
10	11521
11	21227
12	39541
13	74387
14	141201
15	270167
16	520561
17	1009147
18	1966581
19	3849507
20	7563681
21	14908407
22	29462561
23	58351947
24	115776501
25	230052467
26	457677041
27	911425687
28	1816495121
29	3622705627

[107, 161, 247, 401, 667, 1141, 1987, 3521, 6327, 11521, 21227, 39541, 74387, 141201, 270167, 520561, 1009147, 1966581, 3849507, 7563681, 14908407, 29462561, 58351947, 115776501, 230052467, 457677041, 911425687, 1816495121, 3622705627]

cp's OEIS Frontend

A251145 Number of (n+1) X (4+1) 0..2 arrays with every 2 X 2 subblock summing to 4 and no 2 X 2 subblock having exactly two nonzero entries.

Table of values

List of values