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

A197932

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

Terms

    a(0) =1a(1) =2a(2) =8a(3) =27a(4) =375a(5) =3957a(6) =98265a(7) =4450117a(8) =311193258a(9) =39198288628

External references