A155363 - OEIS

A155363

Number of ways to place zero or more nonadjacent 1,0 2,0 2,1 2,2 3,0 4,0 4,1 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.

%I #3 Mar 31 2012 12:35:23

%S 1,7,19,37,79,331,1971,11437,56649,326778,2556228,26440896,303972325,

%T 3581795416,47721457149,785585027118

%N Number of ways to place zero or more nonadjacent 1,0 2,0 2,1 2,2 3,0 4,0 4,1 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.

%e Maximal 10 X 10 X 10 example

%e ............0

%e ...........0.0

%e ..........1.0.0

%e .........1.1.1.0

%e ........1.0.0.0.1

%e .......1.1.0.1.1.1

%e ......0.0.1.0.0.0.1

%e .....0.1.0.0.1.0.1.1

%e ....0.0.1.0.1.0.1.0.0

%e ...0.0.1.1.1.1.0.0.0.0

%K nonn

%O 5,2

%A _R. H. Hardin_ Jan 22 2009