%I A159329
%S A159329 2,4,9,23,54,125,290,674,1567,3643,8469,19688,45769,106400,247350,
%T A159329 575019,1336757,3107583,7224254,16794353,39042134,90761950,210995935,
%U A159329 490506039,1140288197,2650848448,6162474989,14326016268,33303947274
%N A159329 Transform of the finite sequence (1, 0, -1) by the T_{1,1} transformation 
               (see link)
%H A159329 Richard Choulet <a href="http://www.apmep.asso.fr/IMG/pdf/curtz1.pdf">
               Curtz-like transformation </a>
%F A159329 O.g.f f(z)=((1-z)^2/(1-3*z+2*z^2-z^3))*(1-z^2)+(z/(1-3*z+2*z^2-z^3))+((1-z+z^2)/
               (1-3*z+2*z^2-z^3)) a(0)=2, a(1)=4, a(2):=9, a(3):=23, a(4):=54 and 
               for n>=2 a(n+3)=3*a(n+2)-2*a(n+1)+a(n)
%Y A159329 A159328
%Y A159329 Sequence in context: A000571 A077003 A046917 this_sequence A159334 A159330 
               A159331
%Y A159329 Adjacent sequences: A159326 A159327 A159328 this_sequence A159330 A159331 
               A159332
%K A159329 easy,nonn
%O A159329 0,1
%A A159329 Richard Choulet (richardchoulet(AT)yahoo.fr), Apr 10 2009