%I

%S 1,2,7,22,132,1204,13768,244089,6352095,232890454,12491887452,

%T 974287563383,109587446419665,17874622451841230,4227153018169110373,

%U 1447295404720506832342,717895790307321893024403

%N Number of planar n X n X n binary triangular grids with no more than 2 ones in any 3 X 3 X 3 subtriangle.

%K nonn

%O 0,2

%A _R. H. Hardin_ Jan 01 2009