A153962 - OEIS

A153962

Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 8 ones in any 5 X 5 X 5 subtriangle.

%I #9 Oct 28 2023 09:59:29

%S 1,2,2,4,14,16,75,552,1667,11886,186036,1025514,13006464,369745208,

%T 3793772311,86085692189

%N Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 8 ones in any 5 X 5 X 5 subtriangle.

%K nonn,more

%O 0,2

%A _R. H. Hardin_, Jan 03 2009