Number of nXnXn triangular 0..3 arrays with new values introduced in sequential zero-upwards order and exactly one 2x2x2 triangle having values all different.
A271138
Number of nXnXn triangular 0..3 arrays with new values introduced in sequential zero-upwards order and exactly one 2x2x2 triangle having values all different.
Terms
- a(0) =0a(1) =1a(2) =56a(3) =4560a(4) =625280a(5) =158875520a(6) =78509767680
External references
- oeis: A271138