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 equal.
A271406
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 equal.
Terms
- a(0) =0a(1) =0a(2) =15a(3) =11247a(4) =144602898
External references
- oeis: A271406