|
%I #7 Feb 22 2020 20:54:24
%S 1,14,1217,451468,594430765,2924321664147
%N Number of n X n 0..2 arrays with no occurrence of three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..2 introduced in row major order
%C Diagonal of A204978
%e Some solutions for n=5
%e ..0..1..2..0..1....0..1..2..0..1....0..0..1..0..1....0..1..1..2..2
%e ..2..1..2..2..0....2..2..1..1..2....2..1..2..1..2....1..1..2..1..1
%e ..0..0..1..2..0....1..2..2..0..1....2..1..2..1..2....0..0..1..2..2
%e ..0..1..0..0..1....0..0..1..1..2....0..2..1..2..0....2..0..0..2..0
%e ..2..2..1..2..1....2..2..0..2..1....1..2..0..2..0....2..2..1..1..2
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 21 2012
| 