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A042073 Denominators of continued fraction convergents to sqrt(560). 2
1, 1, 2, 3, 140, 143, 283, 426, 19879, 20305, 40184, 60489, 2822678, 2883167, 5705845, 8589012, 400800397, 409389409, 810189806, 1219579215, 56910833696, 58130412911, 115041246607, 173171659518, 8080937584435, 8254109243953, 16335046828388, 24589156072341 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (0,0,0,142,0,0,0,-1).

FORMULA

G.f.: -(x^2-x-1)*(x^4+3*x^2+1) / ((x^4-12*x^2+1)*(x^4+12*x^2+1)). - Colin Barker, Dec 01 2013

MATHEMATICA

Denominator[Convergents[Sqrt[560], 30]] (* Vincenzo Librandi, Jan 13 2014 *)

CROSSREFS

Cf. A042072, A040536.

Sequence in context: A057738 A234999 A254787 * A124236 A115231 A042369

Adjacent sequences:  A042070 A042071 A042072 * A042074 A042075 A042076

KEYWORD

nonn,cofr,frac,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Colin Barker, Dec 01 2013

STATUS

approved

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Last modified February 25 19:39 EST 2021. Contains 341618 sequences. (Running on oeis4.)