A207865 - cp's OEIS frontend

A207865 Number of n X 3 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal or vertical neighbor (colorings ignoring permutations of colors).

n	a(n)
1	2
2	34
3	2052
4	278982
5	68162042
6	26419793726
7	15002771641712
8	11807624578397830
9	12361734324171045410
10	16679505289611340233906
11	28284296659644702241447604
12	59055088260515144420128767278
13	149249218670114328150978145481610

[2, 34, 2052, 278982, 68162042, 26419793726, 15002771641712, 11807624578397830, 12361734324171045410, 16679505289611340233906, 28284296659644702241447604, 59055088260515144420128767278, 149249218670114328150978145481610]

cp's OEIS Frontend

A207865 Number of n X 3 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal or vertical neighbor (colorings ignoring permutations of colors).

Table of values

List of values