Number of n X n X n triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 11.
A166206
Number of n X n X n triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 11.
Terms
- a(0) =1a(1) =12a(2) =4a(3) =16a(4) =357a(5) =1880a(6) =26443a(7) =1765534a(8) =25412877a(9) =1480441810a(10) =406769105056
External references
- oeis: A166206