Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 14 ones in any 5 X 5 X 5 subtriangle.
A154003
Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 14 ones in any 5 X 5 X 5 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =4a(4) =16a(5) =31a(6) =127a(7) =1022a(8) =3968a(9) =31615a(10) =522452a(11) =4046545a(12) =64740079a(13) =2139507457a(14) =33141584010
External references
- oeis: A154003