Number of n X n 1..3 arrays with no element with value z exactly a city block distance of z from another element with value z.
A209366
Number of n X n 1..3 arrays with no element with value z exactly a city block distance of z from another element with value z.
Terms
- a(0) =3a(1) =39a(2) =115a(3) =968a(4) =19434a(5) =677448a(6) =43249360a(7) =5008603698
External references
- oeis: A209366