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A042407 Denominators of continued fraction convergents to sqrt(731). 2
1, 27, 1459, 39420, 2130139, 57553173, 3110001481, 84027593160, 4540600032121, 122680228460427, 6629272936895179, 179113049524630260, 9678733947266929219, 261504929625731719173, 14130944933736779764561, 381797018140518785362320 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (0,1460,0,-1).

FORMULA

G.f.: -(x^2-27*x-1) / (x^4-1460*x^2+1). - Colin Barker, Dec 11 2013

MATHEMATICA

Denominator[Convergents[Sqrt[731], 30]] (* Vincenzo Librandi, Jan 21 2014 *)

CROSSREFS

Cf. A042406, A040703.

Sequence in context: A075547 A167732 A017103 * A042404 A073224 A294964

Adjacent sequences:  A042404 A042405 A042406 * A042408 A042409 A042410

KEYWORD

nonn,frac,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

a(15) from Colin Barker, Dec 11 2013

STATUS

approved

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Last modified November 13 15:41 EST 2019. Contains 329106 sequences. (Running on oeis4.)