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

A195157

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

Terms

    a(0) =1a(1) =2a(2) =20a(3) =252a(4) =7403a(5) =421616a(6) =52543529a(7) =13657426873

External references