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

A197866

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

Terms

    a(0) =1a(1) =4a(2) =42a(3) =793a(4) =32276a(5) =2592379a(6) =423445648a(7) =145596625120

External references