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A041046 Numerators of continued fraction convergents to sqrt(29). 11

%I #29 Jun 10 2021 11:36:59

%S 5,11,16,27,70,727,1524,2251,3775,9801,101785,213371,315156,528527,

%T 1372210,14250627,29873464,44124091,73997555,192119201,1995189565,

%U 4182498331,6177687896,10360186227,26898060350

%N Numerators of continued fraction convergents to sqrt(29).

%C From _Johannes W. Meijer_, Jun 12 2010: (Start)

%C The terms of this sequence can be constructed with the terms of sequence A087130.

%C For the terms of the periodical sequence of the continued fraction for sqrt(29) see A010128. We observe that its period is five. The decimal expansion of sqrt(29) is A010484. (End)

%H Vincenzo Librandi, <a href="/A041046/b041046.txt">Table of n, a(n) for n = 0..200</a>

%H <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,0,0,140,0,0,0,0,1).

%F a(5*n) = A087130(3*n+1), a(5*n+1) = (A087130(3*n+2) - A087130(3*n+1))/2, a(5*n+2) = ( A087130(3*n+2) + A087130(3*n+1))/2, a(5*n+3) = A087130(3*n+2) and a(5*n+4) = A087130(3*n+3)/2. - _Johannes W. Meijer_, Jun 12 2010

%F G.f.: (5 + 11*x + 16*x^2 + 27*x^3 + 70*x^4 + 27*x^5 - 16*x^6 + 11*x^7 - 5*x^8 + x^9)/(1 - 140*x^5 - x^10) - _Peter J. C. Moses_, Jul 29 2013

%t Table[Numerator[FromContinuedFraction[ContinuedFraction[Sqrt[29],n]]],{n,1,50}] (* _Vladimir Joseph Stephan Orlovsky_, Mar 18 2011 *)

%t Numerator[Convergents[Sqrt[29], 30]] (* _Vincenzo Librandi_, Oct 28 2013 *)

%t LinearRecurrence[ {0,0,0,0,140,0,0,0,0,1},{5,11,16,27,70,727,1524,2251,3775,9801},30] (* _Harvey P. Dale_, Jun 10 2021 *)

%Y Cf. A041047, A041018, A041046, A041090, A041150, A041226, A041318, A041426, A041550, A010484.

%K nonn,frac,easy

%O 0,1

%A _N. J. A. Sloane_.

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Last modified April 24 06:03 EDT 2024. Contains 371918 sequences. (Running on oeis4.)