Number of nXnXn triangular 0..3 arrays with some element plus some adjacent element totalling 3+1, 3 or 3-1 exactly once.
A270845
Number of nXnXn triangular 0..3 arrays with some element plus some adjacent element totalling 3+1, 3 or 3-1 exactly once.
Terms
- a(0) =0a(1) =6a(2) =30a(3) =252a(4) =2298a(5) =28440a(6) =460494a(7) =10076742a(8) =298685550a(9) =12084696450a(10) =669841797084
External references
- oeis: A270845