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%I #5 Mar 31 2012 12:36:20
%S 1,4,32,456,12448,633496,60579496,10860561408,3651968551248,
%T 2303009639295776,2723749599014985200,6041414189694017609992,
%U 25131037868379536848766008,196057055650843201586074483360
%N Half the number of nXnXn triangular binary arrays with every element equal to at most 4 neighbors
%H R. H. Hardin, <a href="/A192486/b192486.txt">Table of n, a(n) for n = 1..15</a>
%e Some solutions for 5X5X5 with a(1,1)=0
%e ......0..........0..........0..........0..........0..........0..........0
%e .....1.1........0.0........1.0........0.1........0.1........1.0........0.0
%e ....1.0.0......1.1.1......1.1.0......0.0.1......1.0.1......1.1.0......1.1.0
%e ...1.1.1.0....1.0.1.0....0.1.1.0....1.1.1.1....0.0.1.1....0.1.1.0....1.0.1.0
%e ..0.1.0.0.1..1.1.0.1.0..1.1.0.0.0..0.1.0.1.0..0.0.1.0.0..1.1.0.1.0..0.0.1.1.1
%K nonn
%O 1,2
%A _R. H. Hardin_ Jul 02 2011
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