Number of nXnXn triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 6.
A166201
Number of nXnXn triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 6.
Terms
- a(0) =1a(1) =7a(2) =3a(3) =7a(4) =66a(5) =218a(6) =1340a(7) =25771a(8) =157803a(9) =2661967a(10) =140020892a(11) =1770255356a(12) =73044448611
External references
- oeis: A166201