Search: id:A155405
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%I A155405
%S A155405 1,7,19,37,61,179,1570,9884,43279,162911,1062503,13577598,173995382,
%T A155405 1740580398,16367827293,223104829665,4754997792283,115851743032210
%N A155405 Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 3,3 
               4,1 4,2 5,3 polyhexes in any orientation on a planar nXnXn triangular 
               grid.
%e A155405 Maximal 10 X 10 X 10 example
%e A155405 ............0
%e A155405 ...........0.1
%e A155405 ..........1.1.0
%e A155405 .........0.0.1.1
%e A155405 ........0.1.1.0.0
%e A155405 .......0.0.0.1.0.0
%e A155405 ......1.0.1.0.0.1.0
%e A155405 .....0.1.1.0.1.1.0.1
%e A155405 ....1.1.0.1.0.0.1.1.0
%e A155405 ...0.0.1.0.0.0.1.0.1.0
%Y A155405 Sequence in context: A002407 A098484 A155443 this_sequence A155448 A155446 
               A155372
%Y A155405 Adjacent sequences: A155402 A155403 A155404 this_sequence A155406 A155407 
               A155408
%K A155405 nonn
%O A155405 5,2
%A A155405 Ron Hardin (rhhardin(AT)att.net) Jan 22 2009

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