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A042721 Denominators of continued fraction convergents to sqrt(890). 2
1, 1, 5, 6, 353, 359, 1789, 2148, 126373, 128521, 640457, 768978, 45241181, 46010159, 229281817, 275291976, 16196216425, 16471508401, 82082250029, 98553758430, 5798200238969, 5896753997399, 29385216228565, 35281970225964, 2075739489334477, 2111021459560441 (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, 358, 0, 0, 0, -1).

FORMULA

G.f.: -(x^2-x-1)*(x^4+6*x^2+1) / (x^8-358*x^4+1). - Colin Barker, Dec 22 2013

MATHEMATICA

Denominator[Convergents[Sqrt[890], 30]] (* Vincenzo Librandi, Jan 27 2014 *)

CROSSREFS

Cf. A042720, A040860.

Sequence in context: A042387 A007666 A064177 * A246307 A269588 A048658

Adjacent sequences:  A042718 A042719 A042720 * A042722 A042723 A042724

KEYWORD

nonn,frac,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Colin Barker, Dec 22 2013

STATUS

approved

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Last modified February 21 15:31 EST 2019. Contains 320374 sequences. (Running on oeis4.)