%I #3 Mar 31 2012 12:35:21
%S 1,2,2,4,16,31,122,973,3890,30317,486144,3845485,61098761,1952652536,
%T 30753790733,973261651722,61980407029298,1943138871957133,
%U 122570367648067555
%N Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 12 ones in any 5 X 5 X 5 subtriangle.
%K nonn
%O 0,2
%A _R. H. Hardin_ Jan 04 2009