1,2

A033490 := proc(n) option remember; if n <= 2 then n else A033490(n-1)+A033490(round(2*(n-1)/2))+A033490(round((n-1)/2)); fi; end;

Sequence in context: A116726 A125180 A073778 this_sequence A116716 A128812 A078410

Adjacent sequences: A033487 A033488 A033489 this_sequence A033491 A033492 A033493

nonn

N. J. A. Sloane (njas(AT)research.att.com).