Number of n X 1 1..2 arrays with every element value z a city block distance of exactly z from another element value z.
A209603
Number of n X 1 1..2 arrays with every element value z a city block distance of exactly z from another element value z.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =2a(4) =2a(5) =4a(6) =6a(7) =9a(8) =13a(9) =19a(10) =27a(11) =39a(12) =57a(13) =84a(14) =124a(15) =183a(16) =269a(17) =394a(18) =576a(19) =842a(20) =1232a(21) =1805a(22) =2647a(23) =3883a(24) =5695a(25) =8349a(26) =12235a(27) =17926a(28) =26264a(29) =38485
External references
- oeis: A209603