Number of nXnXn triangular 0..5 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal.
A271337
Number of nXnXn triangular 0..5 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal.
Terms
- a(0) =0a(1) =1a(2) =36a(3) =19620a(4) =150055420
External references
- oeis: A271337