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

A202761

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

Terms

    a(0) =1a(1) =7a(2) =18a(3) =146a(4) =2128a(5) =28764a(6) =1064140a(7) =59594272a(8) =4526156600

External references