2085852domain: NAppears in sequencesNumber of planar n X n X n binary triangular grids with no more than 9 ones in any 4 X 4 X 4 subtriangle.at n=6A153534Number of planar n X n X n binary triangular grids with no more than 9 ones in any similarly oriented 4 X 4 X 4 subtriangle.at n=6A153563