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

A198005

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

Terms

    a(0) =1a(1) =4a(2) =4a(3) =44a(4) =562a(5) =4173a(6) =288399a(7) =13101564a(8) =817352426

External references