Number of planar triangular n X n X n nonnegative integer grids symmetric under 120 degree rotation with every similarly oriented 5 X 5 X 5 subtriangle summing to 12.
A154085
Number of planar triangular n X n X n nonnegative integer grids symmetric under 120 degree rotation with every similarly oriented 5 X 5 X 5 subtriangle summing to 12.
Terms
- a(0) =70a(1) =480a(2) =2928a(3) =2735a(4) =3045a(5) =14039a(6) =12442a(7) =4685a(8) =25484a(9) =7105a(10) =3050
External references
- oeis: A154085