A222901 - cp's OEIS frontend

A222901 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

n	a(n)
1	1
2	7
3	45
4	767
5	4909
6	119393
7	759891
8	20299463
9	130579169
10	3588643955
11	23230932391
12	647426033879
13	4209052934053
14	118324983126455
15	771976078016995
16	21829828686370139
17	142850851773130033
18	4056660324820606967

[1, 7, 45, 767, 4909, 119393, 759891, 20299463, 130579169, 3588643955, 23230932391, 647426033879, 4209052934053, 118324983126455, 771976078016995, 21829828686370139, 142850851773130033, 4056660324820606967]

cp's OEIS Frontend

A222901 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

Table of values

List of values