A208044 - cp's OEIS frontend

A208044 Number of n X 3 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any horizontal, vertical or antidiagonal neighbor (colorings ignoring permutations of colors).

n	a(n)
1	2
2	8
3	44
4	244
5	1356
6	7540
7	41932
8	233204
9	1296972
10	7213172
11	40116428
12	223109620
13	1240835916
14	6900974452
15	38380133836
16	213453141236
17	1187130917964
18	6602291295860
19	36718991727308
20	204214611724276
21	1135750348251468

[2, 8, 44, 244, 1356, 7540, 41932, 233204, 1296972, 7213172, 40116428, 223109620, 1240835916, 6900974452, 38380133836, 213453141236, 1187130917964, 6602291295860, 36718991727308, 204214611724276, 1135750348251468]

cp's OEIS Frontend

A208044 Number of n X 3 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any horizontal, vertical or antidiagonal neighbor (colorings ignoring permutations of colors).

Table of values

List of values