%I
%S 1,2,4,10,28,148,714,6039,49623,697824,9570390,228608398,5268376882,
%T 211052632687,8181458661819,550685739585810,35868897568521948,
%U 4059582510922093828,444431993377350866570,84536428851931450778591
%N Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 3 ones in any 3 X 3 X 3 subtriangle.
%K nonn
%O 0,2
%A _R. H. Hardin_ Jan 03 2009
