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%I #5 Mar 31 2012 12:35:59
%S 21,2755,2167173,10378244309,301753233626727,53293289955084658949,
%T 57168347029530545962203193,372482322079037724494019844619359
%N 1/3 the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically
%C Diagonal of A184376
%e Some solutions for 3X3 with a(1,1)=0
%e ..0..1..2....0..2..1....0..0..2....0..0..2....0..0..1....0..2..1....0..1..0
%e ..2..1..1....1..1..1....2..2..2....0..0..2....2..0..2....0..0..1....0..1..2
%e ..1..1..2....0..1..1....0..1..0....1..1..2....2..0..0....0..2..1....2..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 12 2011