%I A007307
%S A007307 0,1,2,1,3,3,4,6,7,10,13,17,23,30,40,53,70,93,123,163,216,
%T A007307 286,379,502,665,881,1167,1546,2048,2713,3594,4761,6307,
%U A007307 8355,11068,14662,19423,25730,34085,45153,59815,79238,104968
%N A007307 a(n)=a(n-2)+a(n-3).
%p A007307 restart: G(x):=(-1-x^3)/(-1+x^2+x^3): f[0]:=G(x): for n from 1 to 58 
               do f[n]:=diff(f[n-1],x) od: x:=0: seq(f[n]/n!,n=1..43);# [From Zerinvary 
               Lajos (zerinvarylajos(AT)yahoo.com), Mar 27 2009]
%Y A007307 Sequence in context: A032303 A032215 A117363 this_sequence A141576 A078019 
               A038071
%Y A007307 Adjacent sequences: A007304 A007305 A007306 this_sequence A007308 A007309 
               A007310
%K A007307 nonn
%O A007307 0,3
%A A007307 N. J. A. Sloane (njas(AT)research.att.com).