|
A155392
|
|
Number of ways to place zero or more nonadjacent 1,1 2,1 3,0 3,1 4,2 4,3 4,4 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
|
|
0
|
|
|
%I
%S 1,4,13,28,49,96,501,3463,18127,74376,331418,2409920,26775212,
%T 305337017,3047283148,31207251008,409221933719
%N Number of ways to place zero or more nonadjacent 1,1 2,1 3,0 3,1 4,2 4,3 4,4 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
%e Maximal 10 X 10 X 10 example
%e ............0
%e ...........1.0
%e ..........0.1.0
%e .........0.0.1.1
%e ........1.1.1.0.0
%e .......0.0.0.1.0.1
%e ......1.0.1.0.0.1.0
%e .....0.1.1.0.1.1.0.0
%e ....0.1.0.1.0.0.1.1.1
%e ...0.1.0.0.1.0.1.0.0.0
%K nonn
%O 5,2
%A _R. H. Hardin_ Jan 22 2009
|
