Number of nX4 array permutations with each element moved but moved no more than a city block distance of two.
A188978
Number of nX4 array permutations with each element moved but moved no more than a city block distance of two.
Terms
- a(0) =4a(1) =900a(2) =295264a(3) =54113236a(4) =10523263424
External references
- oeis: A188978