Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,2,1,0,0,1,1 for x=0,1,2,3,4,5,6.

A197872

Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,2,1,0,0,1,1 for x=0,1,2,3,4,5,6.

Terms

    a(0) =1a(1) =4a(2) =28a(3) =457a(4) =19312a(5) =1569476a(6) =297589596a(7) =128297106268

External references