Number of nXnXn triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 12.
A166207
Number of nXnXn triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 12.
Terms
- a(0) =1a(1) =13a(2) =5a(3) =19a(4) =479a(5) =2636a(6) =42285a(7) =3484228a(8) =56578703a(9) =4011008946
External references
- oeis: A166207