A222681 - cp's OEIS frontend

A222681 Number of 3Xn 0..3 arrays with no more than floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

n	a(n)
1	5
2	5
3	11
4	58
5	142
6	2398
7	6463
8	146947
9	401552
10	9871237
11	27759999
12	675112590
13	1962193874
14	46428879519
15	139050595341
16	3201678397354
17	9862902257940
18	221229238222335
19	700012077054917

[5, 5, 11, 58, 142, 2398, 6463, 146947, 401552, 9871237, 27759999, 675112590, 1962193874, 46428879519, 139050595341, 3201678397354, 9862902257940, 221229238222335, 700012077054917]

cp's OEIS Frontend

A222681 Number of 3Xn 0..3 arrays with no more than floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

Table of values

List of values