A208865 - cp's OEIS frontend

A208865 Number of n X n 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.

n	a(n)
1	1
2	12
3	6520
4	52947540
5	5134914951163
6	5935974611645510227
7	81798476241280856702695038
8	13436627707296496011221331402032076
9	26310300796694291418752809230234516335649298

[1, 12, 6520, 52947540, 5134914951163, 5935974611645510227, 81798476241280856702695038, 13436627707296496011221331402032076, 26310300796694291418752809230234516335649298]

cp's OEIS Frontend

A208865 Number of n X n 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.

Table of values

List of values