A208404 - cp's OEIS frontend

A208404 Number of n X 4 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	15
2	2698
3	658450
4	163422914
5	40595679634
6	10084768380770
7	2505261257850802
8	622357842865595522
9	154606345205565641170
10	38407360426219085921186
11	9541169432411414821885426
12	2370220528768971149166621890

[15, 2698, 658450, 163422914, 40595679634, 10084768380770, 2505261257850802, 622357842865595522, 154606345205565641170, 38407360426219085921186, 9541169432411414821885426, 2370220528768971149166621890]

cp's OEIS Frontend

A208404 Number of n X 4 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