Number of nXnXn triangular 0..6 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all different.
A271244
Number of nXnXn triangular 0..6 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) =39210a(4) =48347502a(5) =187829420863
External references
- oeis: A271244