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A041774 Numerators of continued fraction convergents to sqrt(408). 2
20, 101, 4060, 20401, 820100, 4120901, 165656140, 832401601, 33461720180, 168141002501, 6759101820220, 33963650103601, 1365305105964260, 6860489179924901, 275784872302960300, 1385784850694726401, 55707178900092016340, 279921679351154808101 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Index entries for linear recurrences with constant coefficients, signature (0,202,0,-1).

FORMULA

G.f.: -(x+4)*(x^2-24*x-5) / (x^4-202*x^2+1). - Colin Barker, Nov 24 2013

MATHEMATICA

Numerator[Convergents[Sqrt[408], 30]] (* Vincenzo Librandi, Nov 08 2013 *)

CROSSREFS

Cf. A041775, A040387.

Sequence in context: A043462 A044271 A044652 * A043217 A039394 A043997

Adjacent sequences:  A041771 A041772 A041773 * A041775 A041776 A041777

KEYWORD

nonn,cofr,frac,easy,less

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Colin Barker, Nov 24 2013

STATUS

approved

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Last modified January 24 23:49 EST 2021. Contains 340414 sequences. (Running on oeis4.)