Number of 7 X 7 X 7 triangular 0..n arrays with some element plus some adjacent element totalling n+1, n or n-1 exactly once.
A270856
Number of 7 X 7 X 7 triangular 0..n arrays with some element plus some adjacent element totalling n+1, n or n-1 exactly once.
Terms
- a(0) =0a(1) =0a(2) =460494a(3) =4875050400
External references
- oeis: A270856