Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 7 ones in any 5 X 5 X 5 subtriangle.
A153957
Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 7 ones in any 5 X 5 X 5 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =16a(4) =56a(5) =256a(6) =1518a(7) =15896a(8) =171565a(9) =3217779a(10) =58858443a(11) =1927799742a(12) =63170771231
External references
- oeis: A153957