%I #8 Feb 25 2023 18:06:42
%S 1,2,1,1,2,2,2,4,3,5,6,8,8,24,15,28,52,66,85,246,226,453,898,1300,
%T 1806,6204,5820,13820,31156,51179,81402
%N Number of planar n X n X n binary triangular grids symmetric both under 120-degree rotation and reflection with no more than 1 one in any 4 X 4 X 4 subtriangle.
%K nonn
%O 0,2
%A _R. H. Hardin_, Jan 03 2009