A208402 - cp's OEIS frontend

A208402 Number of n X 2 0..3 arrays with new values 0..3 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	2
2	15
3	187
4	2795
5	43947
6	700075
7	11188907
8	178973355
9	2863377067
10	45813246635
11	733008800427
12	11728128223915
13	187650001250987
14	3002399818689195
15	48038396293720747
16	768614337478306475
17	12297829386768001707

[2, 15, 187, 2795, 43947, 700075, 11188907, 178973355, 2863377067, 45813246635, 733008800427, 11728128223915, 187650001250987, 3002399818689195, 48038396293720747, 768614337478306475, 12297829386768001707]

cp's OEIS Frontend

A208402 Number of n X 2 0..3 arrays with new values 0..3 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