Number of nX2 0..3 arrays with every element value z a city block distance of exactly z from another element value z.
A209174
Number of nX2 0..3 arrays with every element value z a city block distance of exactly z from another element value z.
Terms
- a(0) =2a(1) =13a(2) =115a(3) =1243a(4) =11598a(5) =110995a(6) =1053489a(7) =9540747a(8) =85820627a(9) =770618921a(10) =6892469296a(11) =61437526441a(12) =548885702669
External references
- oeis: A209174