Search: id:A140504
Results 1-1 of 1 results found.

%I A140504
%S A140504 5,6,8,12,20,36,68,132,260,516,1028,2052,4100,8196,16388,32772,65540,
%T A140504 131076,262148,524292,1048580,2097156,4194308,8388612,16777220,33554436,
%U A140504 67108868,134217732,268435460,536870916,1073741828
%N A140504 2^n+4.
%F A140504 G.f.: (5-9*x)/((1-x)*(1-2*x)) [From Jaume Oliver Lafont (joliverlafont(AT)gmail.com), 
               Aug 30 2009]
%F A140504 a(n)=2*a(n-1)-4 (with a(1)=5) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), 
               Dec 01 2009]
%e A140504 For n=2, a(2)=2*5-4=6; n=3, a(3)=2*6-4=8; n=4, a(4)=2*8-4=12 [From Vincenzo 
               Librandi (vincenzo.librandi(AT)tin.it), Dec 01 2009]
%t A140504 Table[2^n + 4, {n, 0, 30}] [From Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), 
               Aug 04 2008]
%o A140504 (Other) sage: [gaussian_binomial(n,1,2)+5 for n in xrange(0,31)] # [From 
               Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 31 2009]
%Y A140504 Sequence in context: A033158 A032721 A105106 this_sequence A120131 A047437 
               A096467
%Y A140504 Adjacent sequences: A140501 A140502 A140503 this_sequence A140505 A140506 
               A140507
%K A140504 nonn,easy,new
%O A140504 0,1
%A A140504 Paul Curtz (bopcrtz(AT)free.fr), Jun 30 2008
%E A140504 More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), 
               Aug 04 2008

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