Number of nXnXn triangular 1..3 arrays with all 1s connected, all 2s connected, all 3s connected, 1 at the top vertex, 2 at the lower left, and 3 at the lower right.
A164744
Number of nXnXn triangular 1..3 arrays with all 1s connected, all 2s connected, all 3s connected, 1 at the top vertex, 2 at the lower left, and 3 at the lower right.
Terms
- a(0) =1a(1) =17a(2) =174a(3) =2084a(4) =35489a(5) =950448a(6) =42560032
External references
- oeis: A164744