|
%I #3 Mar 31 2012 12:35:22
%S 1,7,19,37,88,676,4377,23168,128083,1375195,16989531,217989023,
%T 2931139962,55566047699,1303222849730,35399619266821
%N Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 3,1 3,2 4,2 polyhexes in any orientation on a planar nXnXn triangular grid.
%C Same series for 0,0 1,0 2,1 2,2 3,1 4,2 polyhexes.
%C Same series for 0,0 1,0 1,1 2,0 2,1 3,1 3,2 4,2 polyhexes.
%e Maximal 9 X 9 X 9 example
%e ...........0
%e ..........0.0
%e .........1.1.1
%e ........0.1.0.1
%e .......0.0.0.1.1
%e ......0.0.0.0.0.0
%e .....1.1.0.0.1.1.1
%e ....0.1.0.1.0.1.0.1
%e ...0.0.1.1.1.0.0.1.1
%K nonn
%O 4,2
%A _R. H. Hardin_ Jan 22 2009
|
