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

A198037

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

Terms

    a(0) =1a(1) =5a(2) =20a(3) =284a(4) =4771a(5) =199564a(6) =15833279a(7) =2206064568a(8) =659395510659

External references