%I

%S 1,2,4,15,38,236,1250,13966,128542,2461620,40144584,1355506385,

%T 38359079886,2280018933124,113583264552803,11849601571255761,

%U 1037356176207581620,189822553366119038561

%N Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 5 ones in any 4 X 4 X 4 subtriangle.

%K nonn

%O 0,2

%A _R. H. Hardin_ Jan 03 2009