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

A203209

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

Terms

    a(0) =1a(1) =7a(2) =28a(3) =287a(4) =17975a(5) =689715a(6) =104189110a(7) =37047634987

External references