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%I #4 Mar 31 2012 12:35:50
%S 1,4,22,200,2921,67529,2502327,149148042,14187953164,2166282171177,
%T 529836175417335,207601280437878258,130373625773755053650
%N Half the number of nXnXn triangular binary arrays with every element having a neighboring 1-count differing from its neighboring 0-count by two or less
%e Some solutions for 4X4X4 with a(1,1)=0
%e .....0........0........0........0........0........0........0........0
%e ....1.1......0.0......0.0......1.0......1.0......0.1......0.1......0.1
%e ...1.0.0....1.1.1....1.1.1....0.1.0....1.1.0....1.1.0....0.1.0....0.1.0
%e ..1.0.1.1..0.1.1.0..0.0.1.0..0.1.1.0..0.0.1.1..1.1.0.0..1.1.1.0..0.1.1.0
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 03 2011
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