A209497 - cp's OEIS frontend

A209497 Number of n X 2 0..4 arrays with every 2 X 2 subblock containing exactly one value repeat, and new values 0..4 introduced in row major order.

n	a(n)
1	2
2	6
3	57
4	690
5	9393
6	133380
7	1920126
8	27760512
9	401882796
10	5820335088
11	84304518360
12	1221153876288
13	17688664980912
14	256224877720896
15	3711487617186912
16	53761934301895680
17	778756709322725568

[2, 6, 57, 690, 9393, 133380, 1920126, 27760512, 401882796, 5820335088, 84304518360, 1221153876288, 17688664980912, 256224877720896, 3711487617186912, 53761934301895680, 778756709322725568]

cp's OEIS Frontend

A209497 Number of n X 2 0..4 arrays with every 2 X 2 subblock containing exactly one value repeat, and new values 0..4 introduced in row major order.

Table of values

List of values