Number of nX2 array permutations with each element moved but moved no more than a city block distance of two.
A188976
Number of nX2 array permutations with each element moved but moved no more than a city block distance of two.
Terms
- a(0) =1a(1) =9a(2) =116a(3) =900a(4) =7836a(5) =71865a(6) =640513a(7) =5706113a(8) =51056136a(9) =456396688a(10) =4078122040a(11) =36448590305a(12) =325763780945
External references
- oeis: A188976