Number of 9X9X9 triangular nonnegative integer arrays with all sums of an element and its neighbors <= n.
A166195
Number of 9X9X9 triangular nonnegative integer arrays with all sums of an element and its neighbors <= n.
Terms
- a(0) =1a(1) =57523a(2) =509035046
External references
- oeis: A166195