The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #3 Mar 31 2012 12:35:22
%S 1,13,37,201,1391,8373,61097,625360,7715937,116261530,2213148571
%N Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,0 4,1 5,1 polyhexes in any orientation on a planar nXnXn triangular grid.
%e Maximal 12 X 12 X 12 example
%e ..............0
%e .............0.1
%e ............1.1.0
%e ...........1.0.0.1
%e ..........1.0.1.1.0
%e .........1.0.1.0.0.0
%e ........0.0.1.0.1.0.1
%e .......0.0.1.0.0.1.0.1
%e ......1.1.0.0.0.0.1.0.1
%e .....0.0.1.1.1.1.0.1.0.1
%e ....1.1.0.0.0.0.0.1.0.1.0
%e ...0.0.1.1.1.1.0.0.1.0.1.0
%K nonn
%O 5,2
%A _R. H. Hardin_ Jan 22 2009