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Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 6 ones in any 5 X 5 X 5 subtriangle.
0

%I #3 Mar 31 2012 12:35:21

%S 1,2,2,4,5,8,11,40,59,169,555,1319,3615,20488,46826,218870,1193201,

%T 4783860,22240814,199704231,805091958,6227071279,56791304489,

%U 381075628434,2947943372020,45668975412143,300746133172408

%N Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 6 ones in any 5 X 5 X 5 subtriangle.

%K nonn

%O 0,2

%A _R. H. Hardin_ Jan 03 2009