A153558 - OEIS

A153558

Number of planar n X n X n binary triangular grids with no more than 4 ones in any similarly oriented 4 X 4 X 4 subtriangle.

%I #5 Apr 28 2021 00:09:03

%S 1,2,8,57,386,5902,157442,6760327,444864808,50253619003,9489610137995,

%T 2943731871028561,1496950842394800744

%N Number of planar n X n X n binary triangular grids with no more than 4 ones in any similarly oriented 4 X 4 X 4 subtriangle.

%K nonn

%O 0,2

%A _R. H. Hardin_, Jan 01 2009