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

A203113

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

Terms

    a(0) =1a(1) =5a(2) =20a(3) =208a(4) =3516a(5) =108850a(6) =6900201a(7) =776174640a(8) =167355580505

External references