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

A197913

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

Terms

    a(0) =1a(1) =7a(2) =25a(3) =210a(4) =10243a(5) =262443a(6) =22032028a(7) =4876165115

External references