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

A203220

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

Terms

    a(0) =1a(1) =4a(2) =28a(3) =463a(4) =20863a(5) =1908018a(6) =410029022a(7) =207200580086

External references