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

A207154

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

Terms

    a(0) =1a(1) =7a(2) =39a(3) =382a(4) =6840a(5) =199950a(6) =10043572a(7) =854907305a(8) =123241666053

External references