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 11.
A154083
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 11.
Terms
- a(0) =0a(1) =331a(2) =1896a(3) =0a(4) =2038a(5) =7351a(6) =0a(7) =4070a(8) =11033a(9) =0a(10) =1729
External references
- oeis: A154083