Number of nXnXn triangular 0..2 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all equal.
A271401
Number of nXnXn triangular 0..2 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all equal.
Terms
- a(0) =0a(1) =0a(2) =14a(3) =2592a(4) =896832a(5) =685305792
External references
- oeis: A271401