A155435
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Number of ways to place zero or more nonadjacent 2,1 2,2 3,0 3,1 3,3 4,2 4,3 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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%I #3 Mar 31 2012 12:35:23
%S 1,4,13,28,49,105,852,6079,29814,128372,780418,9582912,132900511,
%T 1524452541,17253579386,257451880786,5763064779401,154341468962518
%N Number of ways to place zero or more nonadjacent 2,1 2,2 3,0 3,1 3,3 4,2 4,3 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
%e Maximal 9 X 9 X 9 example
%e ...........0
%e ..........1.0
%e .........0.1.1
%e ........1.1.0.1
%e .......0.0.1.1.0
%e ......1.1.0.0.0.1
%e .....1.0.1.0.1.1.0
%e ....0.1.1.0.1.0.1.1
%e ...0.1.0.1.0.1.1.0.0
%K nonn
%O 4,2
%A _R. H. Hardin_ Jan 22 2009
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