A241125 - cp's OEIS frontend

A241125 Number of n X 2 0..2 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..2 introduced in row major order.

n	a(n)
1	2
2	9
3	54
4	325
5	1965
6	11876
7	71793
8	434007
9	2623694
10	15861001
11	95884409
12	579649484
13	3504151829
14	21183629803
15	128061281038
16	774168159805
17	4680074530261
18	28292428888436
19	171036065180937
20	1033963386740399
21	6250613190784174

[2, 9, 54, 325, 1965, 11876, 71793, 434007, 2623694, 15861001, 95884409, 579649484, 3504151829, 21183629803, 128061281038, 774168159805, 4680074530261, 28292428888436, 171036065180937, 1033963386740399, 6250613190784174]

cp's OEIS Frontend

A241125 Number of n X 2 0..2 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..2 introduced in row major order.

Table of values

List of values