Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 2,3,1,1,0,0,0 for x=0,1,2,3,4,5,6.
A197720
Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 2,3,1,1,0,0,0 for x=0,1,2,3,4,5,6.
Terms
- a(0) =1a(1) =1a(2) =22a(3) =87a(4) =1726a(5) =68819a(6) =4003781a(7) =565032173a(8) =152764693020
External references
- oeis: A197720