%I A155443
%S A155443 1,7,19,37,61,156,946,6587,32063,128930,679319,5663620,64380331,
%T A155443 713842124,7200710477,81450733059,1198927050536
%N A155443 Number of ways to place zero or more nonadjacent 2,1 3,0 3,1 4,2 4,3 
               4,4 5,2 6,2 polyhexes in any orientation on a planar nXnXn triangular 
               grid.
%e A155443 Maximal 11 X 11 X 11 example
%e A155443 .............0
%e A155443 ............0.0
%e A155443 ...........0.1.0
%e A155443 ..........0.0.1.1
%e A155443 .........1.1.1.0.0
%e A155443 ........0.0.0.1.0.0
%e A155443 .......0.0.1.0.1.0.1
%e A155443 ......1.0.1.0.0.0.1.0
%e A155443 .....0.1.1.0.1.1.1.0.0
%e A155443 ....0.1.0.1.0.0.0.1.1.0
%e A155443 ...0.0.0.0.1.0.0.1.0.0.0
%Y A155443 Sequence in context: A133323 A002407 A098484 this_sequence A155405 A155448 
               A155446
%Y A155443 Adjacent sequences: A155440 A155441 A155442 this_sequence A155444 A155445 
               A155446
%K A155443 nonn
%O A155443 6,2
%A A155443 Ron Hardin (rhhardin(AT)att.net) Jan 22 2009