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%I #9 Apr 27 2021 21:16:23
%S 0,6,264,19764,2865780,890824020,613195191972,954838111013352,
%T 3403478388512845692,27993333042034653078324,
%U 534183142761328458054883788,23742792574386065523445979163924
%N Number of defective 3-colorings of an n X n 0..2 array connected horizontally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.
%C Diagonal of A229586.
%e Some solutions for n=3:
%e 0 1 2 0 1 0 0 1 0 0 1 2 0 1 2 0 1 0 0 1 0
%e 0 2 1 2 0 2 1 2 0 2 0 1 0 1 2 2 2 1 2 2 1
%e 1 0 1 2 1 0 1 2 1 2 1 0 0 2 0 1 2 1 1 0 2
%Y Cf. A229586.
%K nonn
%O 1,2
%A _R. H. Hardin_, Sep 26 2013
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