Search: id:A006269
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%I A006269 M4028
%S A006269 5,140,2744420,20670535451567121260,
%T A006269 8831921094058107711185956797335984862612406515067837739780
%N A006269 A continued cotangent.
%D A006269 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A006269 Shallit, Jeffrey; Predictable regular continued cotangent expansions. 
               J. Res. Nat. Bur. Standards Sect. B 80B (1976), no. 2, 285-290.
%F A006269 Contribution from Artur Jasinski (grafix(AT)csl.pl), Oct 03 2008: (Start)
%F A006269 Recurence: Recurence: a(n+1)=a(n)3+3a(n) and a(0)=5
%F A006269 or
%F A006269 a(n)=Table[Round[(5/2 + Sqrt[29]/2)^(3^(n - 1))], {n, 1, 8}] (*Artur 
               Jasinski*) (End)
%t A006269 Contribution from Artur Jasinski (grafix(AT)csl.pl), Oct 03 2008: (Start)
%t A006269 a = {}; k = 5; Do[AppendTo[a, k]; k = k^3 + 3 k, {n, 1, 8}]; a
%t A006269 or
%t A006269 Table[Round[(5/2 + Sqrt[29]/2)^(3^(n - 1))], {n, 1, 8}] (*Artur Jasinski*) 
               (End)
%Y A006269 Sequence in context: A054323 A061320 A136464 this_sequence A066264 A037049 
               A134503
%Y A006269 Adjacent sequences: A006266 A006267 A006268 this_sequence A006270 A006271 
               A006272
%K A006269 nonn
%O A006269 0,1
%A A006269 N. J. A. Sloane (njas(AT)research.att.com).

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