A268744 - cp's OEIS frontend

A268744 Number of n X 2 binary arrays with some element plus some horizontally or vertically adjacent neighbor totalling two no more than once.

n	a(n)
1	4
2	11
3	32
4	89
5	244
6	659
7	1760
8	4657
9	12228
10	31899
11	82752
12	213641
13	549236
14	1406755
15	3591232
16	9140833
17	23204612
18	58765099
19	148496608
20	374496953
21	942729588
22	2369172915
23	5944748064
24	14895231121
25	37272007108
26	93149401019
27	232527917312

[4, 11, 32, 89, 244, 659, 1760, 4657, 12228, 31899, 82752, 213641, 549236, 1406755, 3591232, 9140833, 23204612, 58765099, 148496608, 374496953, 942729588, 2369172915, 5944748064, 14895231121, 37272007108, 93149401019, 232527917312]

cp's OEIS Frontend

A268744 Number of n X 2 binary arrays with some element plus some horizontally or vertically adjacent neighbor totalling two no more than once.

Table of values

List of values