A186454 - cp's OEIS frontend

A186454 Number of (n+1) X 2 binary arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.

n	a(n)
1	16
2	21
3	42
4	61
5	106
6	151
7	245
8	359
9	567
10	840
11	1301
12	1941
13	2977
14	4465
15	6810
16	10247
17	15577
18	23487
19	35635
20	53800
21	81533
22	123193
23	186569
24	282037
25	426954
26	645623
27	977117
28	1477831
29	2236287
30	3382632
31	5118213
32	7742397
33	11714273
34	17721097
35	26811194

[16, 21, 42, 61, 106, 151, 245, 359, 567, 840, 1301, 1941, 2977, 4465, 6810, 10247, 15577, 23487, 35635, 53800, 81533, 123193, 186569, 282037, 426954, 645623, 977117, 1477831, 2236287, 3382632, 5118213, 7742397, 11714273, 17721097, 26811194]

cp's OEIS Frontend

A186454 Number of (n+1) X 2 binary arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.

Table of values

List of values