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Search: id:A146344
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| 2, 4, 6, 8, 10, 12, 18, 20, 26, 34, 42, 48, 50, 52, 54, 60
(list; graph; listen)
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OFFSET
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1,1
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MAPLE
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146326 := proc(n) if not issqr(n) then numtheory[cfrac]( (1+sqrt(n))/2, 'periodic', 'quotients') ; nops(%[2]) ; else 0 ; fi; end: read("transforms") ; a26 := [seq(A146326(n), n=1..1000)] ; RECORDS(a26)[1] ; [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 06 2009]
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MATHEMATICA
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$MaxExtraPrecision = 300; s = 10; aa = {}; Do[k = ContinuedFraction[(1 + Sqrt[n])/2, 1000]; If[Length[k] < 190, AppendTo[aa, 0], m = 1; While[k[[s ]] != k[[s + m]] || k[[s + m]] != k[[s + 2 m]] || k[[s + 2 m]] != k[[s + 3 m]] || k[[s + 3 m]] != k[[s + 4 m]], m++ ]; s = s + 1; While[k[[s ]] != k[[s + m]] || k[[s + m]] != k[[s + 2 m]] || k[[s + 2 m]] != k[[s + 3 m]] || k[[s + 3 m]] != k[[s + 4 m]], m++ ]; AppendTo[aa, m]], {n, 1, 1024}]; Print[aa]; bb = {}; m = 0; Do[If[aa[[k]] > m, AppendTo[bb, aa[[k]]]; m = aa[[k]]], {k, 1, Length[aa]}]; bb (*Artur Jasinski*)
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CROSSREFS
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A000290, A078370, A146326-A146345, A146348-A146360, A146363.
Sequence in context: A100180 A101814 A034090 this_sequence A162763 A113242 A085884
Adjacent sequences: A146341 A146342 A146343 this_sequence A146345 A146346 A146347
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Oct 30 2008
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EXTENSIONS
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42 inserted by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 06 2009
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