A208710 - cp's OEIS frontend

A208710 Number of 3 X n 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.

n	a(n)
1	4
2	32
3	196
4	1268
5	8128
6	52184
7	334948
8	2149988
9	13800400
10	88582472
11	568596052
12	3649722932
13	23426960800
14	150373741496
15	965223885508
16	6195610615940
17	39768587869168
18	255267911291816
19	1638522010126516
20	10517398618896212

[4, 32, 196, 1268, 8128, 52184, 334948, 2149988, 13800400, 88582472, 568596052, 3649722932, 23426960800, 150373741496, 965223885508, 6195610615940, 39768587869168, 255267911291816, 1638522010126516, 10517398618896212]

cp's OEIS Frontend

A208710 Number of 3 X n 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.

Table of values

List of values