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

A203123

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

Terms

    a(0) =1a(1) =2a(2) =17a(3) =116a(4) =2480a(5) =93046a(6) =5938485a(7) =852643276a(8) =227989002500

External references