A222674 - cp's OEIS frontend

A222674 Number of nX3 0..3 arrays with no more than floor(nX3/2) 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	1
2	5
3	11
4	130
5	670
6	9587
7	51055
8	832433
9	4403793
10	76270010
11	393405671
12	7110030015
13	35866532209
14	668872050090
15	3316350242047
16	63280853470227
17	309953030601699
18	6011655335449938
19	29208300615650596
20	572992311551819596

[1, 5, 11, 130, 670, 9587, 51055, 832433, 4403793, 76270010, 393405671, 7110030015, 35866532209, 668872050090, 3316350242047, 63280853470227, 309953030601699, 6011655335449938, 29208300615650596, 572992311551819596]

cp's OEIS Frontend

A222674 Number of nX3 0..3 arrays with no more than floor(nX3/2) 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