A153546 - OEIS

%I #5 Apr 28 2021 00:06:29

%S 1,2,8,64,1024,32647,2077283,263764474,66791728160,33709469463080,

%T 33913901896235535,68015432587509271039

%N Number of planar n X n X n binary triangular grids with no more than 12 ones in any 5 X 5 X 5 subtriangle.

%K nonn

%O 0,2

%A _R. H. Hardin_, Jan 01 2009