A208401 - cp's OEIS frontend

A208401 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 two of its immediate leftward or upward or right-upward antidiagonal neighbors.

n	a(n)
1	1
2	15
3	10682
4	163422914
5	39216100214432
6	146298576850884166522
7	8484183047877022205116428184
8	7648479804732030712438650610523878146
9	107185313935414834818609318544471943157967376388

[1, 15, 10682, 163422914, 39216100214432, 146298576850884166522, 8484183047877022205116428184, 7648479804732030712438650610523878146, 107185313935414834818609318544471943157967376388]

cp's OEIS Frontend

A208401 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 two of its immediate leftward or upward or right-upward antidiagonal neighbors.

Table of values

List of values