A268775 - cp's OEIS frontend

A268775 Number of n X 2 binary arrays with some element plus some horizontally, vertically, diagonally or antidiagonally adjacent neighbor totalling two no more than once.

n	a(n)
1	4
2	11
3	26
4	65
5	148
6	343
7	766
8	1709
9	3752
10	8195
11	17746
12	38233
13	81916
14	174767
15	371366
16	786437
17	1660240
18	3495259
19	7340026
20	15379121
21	32156324
22	67108871
23	139810126
24	290805085
25	603979768
26	1252698803
27	2594876066
28	5368709129
29	11095332172

[4, 11, 26, 65, 148, 343, 766, 1709, 3752, 8195, 17746, 38233, 81916, 174767, 371366, 786437, 1660240, 3495259, 7340026, 15379121, 32156324, 67108871, 139810126, 290805085, 603979768, 1252698803, 2594876066, 5368709129, 11095332172]

cp's OEIS Frontend

A268775 Number of n X 2 binary arrays with some element plus some horizontally, vertically, diagonally or antidiagonally adjacent neighbor totalling two no more than once.

Table of values

List of values