1,3

A033499 := proc(n) option remember; if n <= 2 then 1 else A033499(n-1)+A033499(round(2*(n-1)/3))+A033499(round((n-1)/3)); fi; end;

Sequence in context: A102378 A118026 A108754 this_sequence A106607 A007042 A076274

Adjacent sequences: A033496 A033497 A033498 this_sequence A033500 A033501 A033502

nonn

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