cp's OEIS Frontend

A229528 Number of defective 3-colorings of an n X n 0..2 array connected horizontally, diagonally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.

%I A229528 #9 Apr 27 2021 20:56:13
%S A229528 0,4,58,3064,221096,34811238,10551803060,6668992563052,
%T A229528 8651918812282962,23339962598582951552,131977442018454063156484,
%U A229528 1555694872005636764531499932,38779168607364170627075586723246
%N A229528 Number of defective 3-colorings of an n X n 0..2 array connected horizontally, diagonally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.
%C A229528 Diagonal of A229534.
%e A229528 Some solutions for n=3:
%e A229528   0 1 2   0 0 1   0 1 0   0 1 2   0 1 1   0 1 2   0 1 2
%e A229528   0 1 0   1 2 1   0 2 1   2 1 2   0 2 0   2 1 2   0 2 0
%e A229528   2 2 0   1 2 0   0 2 0   2 0 1   1 2 1   2 0 0   0 2 0
%Y A229528 Cf. A229534.
%K A229528 nonn
%O A229528 1,2
%A A229528 _R. H. Hardin_, Sep 25 2013