Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 10 ones in any 5 X 5 X 5 subtriangle.
A153991
Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 10 ones in any 5 X 5 X 5 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =4a(4) =16a(5) =26a(6) =107a(7) =826a(8) =3054a(9) =23077a(10) =376116a(11) =2691940a(12) =40600759a(13) =1272412451a(14) =17792826487a(15) =517514558991
External references
- oeis: A153991