A222375 - cp's OEIS frontend

A222375 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.

n	a(n)
1	4
2	18
3	118
4	1391
5	20340
6	342953
7	6221698
8	113556454
9	2103238076
10	38940850866
11	724814585064
12	13496985711211
13	251700828899740
14	4703187944642436
15	87873606070564444
16	1646203673458642042
17	30815057060615530576

[4, 18, 118, 1391, 20340, 342953, 6221698, 113556454, 2103238076, 38940850866, 724814585064, 13496985711211, 251700828899740, 4703187944642436, 87873606070564444, 1646203673458642042, 30815057060615530576]

cp's OEIS Frontend

A222375 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.

Table of values

List of values