A047883 Squares on unbounded chessboard for which the least number of knight's moves from corner (0,0) is n.

0, 2, 9, 20, 27, 32, 39, 46, 53, 60, 67, 74, 81, 88, 95, 102, 109, 116, 123, 130, 137, 144, 151, 158, 165, 172, 179, 186, 193, 200, 207, 214, 221, 228, 235

Offset: 0

Author

Clark Kimberling

Keywords

• nonn

Crossrefs

Cf. A098500 (partial sums).

Programs

Mathematica

Join[{0,2,9,20,27},NestList[#+7&,32,30]] (* Harvey P. Dale, Sep 07 2013 *)

Formula

a(n)=7+a(n-1) for n >= 6.