A208867 - cp's OEIS frontend

A208867 Number of n X 3 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	5
2	136
3	6520
4	324682
5	16205218
6	808928836
7	40380275500
8	2015711853262
9	100620769519078
10	5022810805035976
11	250729829501722000
12	12515989521112631602
13	624776054783641480618
14	31187715359825604175756

[5, 136, 6520, 324682, 16205218, 808928836, 40380275500, 2015711853262, 100620769519078, 5022810805035976, 250729829501722000, 12515989521112631602, 624776054783641480618, 31187715359825604175756]

cp's OEIS Frontend

A208867 Number of n X 3 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