The number of distinct positions on an infinite chessboard reachable by the (2,3)-leaper (or zebra) in at most n moves.

A297740

The number of distinct positions on an infinite chessboard reachable by the (2,3)-leaper (or zebra) in at most n moves.

Terms

    a(0) =1a(1) =9a(2) =41a(3) =129a(4) =321a(5) =625a(6) =997a(7) =1413a(8) =1885a(9) =2425a(10) =3033a(11) =3709a(12) =4453a(13) =5265a(14) =6145a(15) =7093a(16) =8109a(17) =9193a(18) =10345a(19) =11565a(20) =12853a(21) =14209a(22) =15633a(23) =17125a(24) =18685a(25) =20313a(26) =22009a(27) =23773a(28) =25605a(29) =27505

External references