Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 5 ones in any 3 X 3 X 3 subtriangle.
A153939
Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 5 ones in any 3 X 3 X 3 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =15a(4) =59a(5) =432a(6) =3332a(7) =48304a(8) =732710a(9) =20860338a(10) =622243455a(11) =34837075520
External references
- oeis: A153939