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%I #4 Mar 31 2012 12:37:34
%S 0,14,784,81546,19331276,10875523234,14610137114552,46893872347639870,
%T 359629516042061730940,6589801210361833609789898
%N Number of (n+1)X(n+1) 0..3 symmetric matrices containing all values 0..3 with every 2X2 subblock having one or three distinct values, and new values 0..3 introduced in lower triangle row major order
%e Some solutions for n=3
%e ..0..1..2..3....0..1..0..3....0..1..2..3....0..1..3..2....0..1..2..1
%e ..1..2..3..1....1..2..2..3....1..2..0..0....1..2..1..2....1..2..3..3
%e ..2..3..0..1....0..2..2..0....2..0..1..3....3..1..3..3....2..3..0..1
%e ..3..1..1..3....3..3..0..3....3..0..3..0....2..2..3..3....1..3..1..3
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 27 2012
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