Number of nXnXn triangular 0..1 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal.
A271333
Number of nXnXn triangular 0..1 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) =15a(3) =207a(4) =3283a(5) =64650a(6) =1640007a(7) =54704700a(8) =2429994600a(9) =144950275305
External references
- oeis: A271333