Search: id:A156664
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%I A156664
%S A156664 1,2,6,16,42,108,274,688,1714,4244,10458,25672,62826,153372
%N A156664 Binomial transform of A052551
%F A156664 A007318 * A052551, where A052551 = (1, 1, 3, 3, 7, 7, 15, 15,...).
%F A156664 G.f.: (x^2 - 2*x + 1)/(2*x^3 + 3*x^2 - 4*x + 1) [From Alexander R. Povolotsky 
               (pevnev(AT)juno.com), Feb 15 2009]
%F A156664 a(n)=2*A000129(n+1)-2^n. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), 
               Jun 15 2009]
%e A156664 a(3) = 16 = (1, 3, 3, 1) dot (1, 1, 3, 3) = (1 + 3 + 9 + 3).
%Y A156664 A052551
%Y A156664 Sequence in context: A143123 A152089 A102699 this_sequence A025169 A111282 
               A115730
%Y A156664 Adjacent sequences: A156661 A156662 A156663 this_sequence A156665 A156666 
               A156667
%K A156664 nonn
%O A156664 0,2
%A A156664 Gary W. Adamson (qntmpkt(AT)yahoo.com), Feb 12 2009

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