A233067 - cp's OEIS frontend

A233067 Number of n X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 in row major order.

n	a(n)
1	1
2	9
3	582
4	164495
5	194998895
6	975239425635
7	20656955820980290
8	1857471420698911806909
9	710147877110621514637926027
10	1155599363385647621950232861908393

[1, 9, 582, 164495, 194998895, 975239425635, 20656955820980290, 1857471420698911806909, 710147877110621514637926027, 1155599363385647621950232861908393]

cp's OEIS Frontend

A233067 Number of n X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 in row major order.

Table of values

List of values