Number of nXnXn triangular 0..7 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all different.
A271245
Number of nXnXn triangular 0..7 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) =77a(3) =39237a(4) =49235880a(5) =209021374705
External references
- oeis: A271245