0,1

Numbers k such that k mod 2 = (k+1) mod 3 = 1 and (k+2) mod 4 <> 1. - Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Jun 15 2004

For n>3, the number of squares on the infinite 3-column chessboard at <=n knight moves from any fixed point. - R. Stephan, Sep 15 2004

Tanya Khovanova, Recursive Sequences

Sequence in context: A110701 A133929 A086470 this_sequence A107978 A043112 A043892

Adjacent sequences: A017626 A017627 A017628 this_sequence A017630 A017631 A017632

nonn,easy

njas