Number of n X n X n triangular 0..2 arrays with new values introduced in sequential zero-upwards order and exactly one 2 X 2 X 2 triangle having values all different.

A271137

Number of n X n X n triangular 0..2 arrays with new values introduced in sequential zero-upwards order and exactly one 2 X 2 X 2 triangle having values all different.

Terms

    a(0) =0a(1) =1a(2) =44a(3) =2529a(4) =239700a(5) =41288768a(6) =13536514992

External references