Number of city-block distance 1 permutations of a side-n hexagonal array.
A216832
Number of city-block distance 1 permutations of a side-n hexagonal array.
Terms
- a(0) =0a(1) =36a(2) =198576a(3) =427073321712
External references
- oeis: A216832
A216832
Number of city-block distance 1 permutations of a side-n hexagonal array.