%I #5 Apr 28 2021 00:04:17
%S 1,2,8,64,1023,32677,2085852,265905471,67702906842,34428713143699,
%T 34967745692003325,70932850637566775944,287382410206743743063615,
%U 2325444305225035139666787461,37582415776409927622720679966198
%N Number of planar n X n X n binary triangular grids with no more than 9 ones in any 4 X 4 X 4 subtriangle.
%K nonn
%O 0,2
%A _R. H. Hardin_, Jan 01 2009