Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 8 ones in any 4 X 4 X 4 subtriangle.
A153959
Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 8 ones in any 4 X 4 X 4 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =4a(4) =14a(5) =30a(6) =115a(7) =828a(8) =3660a(9) =28651a(10) =410624a(11) =3536757a(12) =55125559a(13) =1557898288a(14) =26483635060a(15) =817051497081
External references
- oeis: A153959