Number of nXnXn triangular 0..4 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all different.
A271242
Number of nXnXn triangular 0..4 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all different.
Terms
- a(0) =0a(1) =0a(2) =76a(3) =33672a(4) =28240419a(5) =56147799704
External references
- oeis: A271242