Search: id:A034491
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%I A034491
%S A034491 2,8,50,344,2402,16808,117650,823544,5764802,40353608,282475250,
%T A034491 1977326744,13841287202,96889010408,678223072850,4747561509944,
%U A034491 33232930569602,232630513987208,1628413597910450,11398895185373144
%N A034491 7^n + 1.
%C A034491 Numbers n for which the expression 7^n/(n-1) is an integer. - Paolo P. 
               Lava (ppl(AT)spl.at), May 29 2006
%H A034491 <a href="Sindx_Rea.html#recLCC">Index entries for sequences related to 
               linear recurrences with constant coefficients</a>
%F A034491 a(n) = 7a(n-1) - 6 = 8a(n-1) - 7a(n-2).
%F A034491 G.f.: 1/(1-x)+1/(1-7*x). E.g.f.: e^x+e^(7*x). [From Mohammad K. Azarian 
               (azarian(AT)evansville.edu), Jan 02 2009]
%t A034491 Table[7^n + 1, {n, 0, 20}]
%o A034491 (Other) sage: [sigma(7,n)for n in xrange(0,20)] # [From Zerinvary Lajos 
               (zerinvarylajos(AT)yahoo.com), Jun 04 2009]
%Y A034491 Cf. A000051, A034472, A052539, A034474, A062394, A062395, A062396, A007689, 
               A063376, A063481, A074600 - A074624.
%Y A034491 Sequence in context: A046165 A114619 A027047 this_sequence A121677 A120956 
               A000557
%Y A034491 Adjacent sequences: A034488 A034489 A034490 this_sequence A034492 A034493 
               A034494
%K A034491 easy,nonn
%O A034491 0,1
%A A034491 N. J. A. Sloane (njas(AT)research.att.com).

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