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

A198022

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

Terms

    a(0) =1a(1) =7a(2) =25a(3) =286a(4) =16905a(5) =487756a(6) =84846740a(7) =20920795356

External references