A239531 - cp's OEIS frontend

A239531 Number of (n+1) X (2+1) 0..2 arrays with no element equal to all horizontal neighbors or unequal to all vertical neighbors, and new values 0..2 introduced in row major order.

n	a(n)
1	2
2	2
3	24
4	68
5	406
6	1584
7	7790
8	33630
9	156032
10	695344
11	3168922
12	14262616
13	64640674
14	291830210
15	1320357280
16	5966652996
17	26981170086
18	121963213688
19	551425857374
20	2492844327694
21	11270188295640
22	50950869428672
23	230346017497690

[2, 2, 24, 68, 406, 1584, 7790, 33630, 156032, 695344, 3168922, 14262616, 64640674, 291830210, 1320357280, 5966652996, 26981170086, 121963213688, 551425857374, 2492844327694, 11270188295640, 50950869428672, 230346017497690]

cp's OEIS Frontend

A239531 Number of (n+1) X (2+1) 0..2 arrays with no element equal to all horizontal neighbors or unequal to all vertical neighbors, and new values 0..2 introduced in row major order.

Table of values

List of values