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

A197925

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

Terms

    a(0) =1a(1) =4a(2) =22a(3) =156a(4) =4277a(5) =103671a(6) =7433963a(7) =912939580a(8) =204689985054

External references