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A042723 Denominators of continued fraction convergents to sqrt(891). 2
1, 1, 6, 7, 13, 20, 113, 133, 7827, 7960, 47627, 55587, 103214, 158801, 897219, 1056020, 62146379, 63202399, 378158374, 441360773, 819519147, 1260879920, 7123918747, 8384798667, 493442241433, 501827040100, 3002577441933, 3504404482033, 6506981923966 (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, 0, 0, 0, 0, 7940, 0, 0, 0, 0, 0, 0, 0, -1).

FORMULA

G.f.: -(x^2-x-1)*(x^4+7*x^2+1)*(x^8+19*x^4+1) / (x^16-7940*x^8+1). - Colin Barker, Dec 22 2013

MATHEMATICA

Denominator[Convergents[Sqrt[891], 30]] (* Vincenzo Librandi, Jan 27 2014 *)

CROSSREFS

Cf. A042722, A040861.

Sequence in context: A041175 A041074 A041749 * A160825 A020689 A128844

Adjacent sequences:  A042720 A042721 A042722 * A042724 A042725 A042726

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 19 10:18 EST 2019. Contains 320310 sequences. (Running on oeis4.)