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A229405 Number of n X n 0..3 arrays avoiding 11 horizontally, 22 vertically, 33 antidiagonally and 00 diagonally.

%I A229405 #8 Jul 23 2025 05:43:05
%S A229405 4,163,53538,142475606,3113479414050,555943964324988272,
%T A229405 812793729526357032659346,9723835061406716550009482645332,
%U A229405 952115739439339063251356375563511227580
%N A229405 Number of n X n 0..3 arrays avoiding 11 horizontally, 22 vertically, 33 antidiagonally and 00 diagonally.
%C A229405 Diagonal of A229412
%H A229405 R. H. Hardin, <a href="/A229405/b229405.txt">Table of n, a(n) for n = 1..10</a>
%e A229405 Some solutions for n=3
%e A229405 ..0..0..1....3..2..1....2..2..3....2..2..1....0..2..0....3..0..0....1..2..3
%e A229405 ..3..3..1....1..3..2....3..1..0....3..1..0....0..3..1....0..2..1....2..0..3
%e A229405 ..0..2..0....2..2..0....3..3..3....1..2..0....1..3..1....1..3..2....3..0..1
%K A229405 nonn
%O A229405 1,1
%A A229405 _R. H. Hardin_ Sep 22 2013