Number of n X n X n triangular 0..1 arrays with no 2 X 2 X 2 subblock having three equal elements.

A277211

Number of n X n X n triangular 0..1 arrays with no 2 X 2 X 2 subblock having three equal elements.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =24a(4) =130a(5) =960a(6) =9702a(7) =134512a(8) =2562516a(9) =67152240a(10) =2422643366a(11) =120395521752

External references