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A042620 Numerators of continued fraction convergents to sqrt(839). 2
28, 29, 811, 840, 47851, 48691, 1362508, 1411199, 80389652, 81800851, 2289012629, 2370813480, 135054567509, 137425380989, 3845539854212, 3982965235201, 226891593025468, 230874558260669, 6460504666063531 (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 (0,0,0,1680,0,0,0,-1).

FORMULA

G.f.: (28 + 29*x + 811*x^2 + 840*x^3 + 811*x^4 - 29*x^5 +

28*x^6 - x^7) / (1 - 1680*x^4 + x^8). [Bruno Berselli, Nov 30 2013]

MATHEMATICA

Numerator[Convergents[Sqrt[839], 30]] (* Harvey P. Dale, Apr 20 2013 *)

CROSSREFS

Cf. A042621.

Sequence in context: A042614 A042616 A042618 * A042621 A042622 A044977

Adjacent sequences:  A042617 A042618 A042619 * A042621 A042622 A042623

KEYWORD

nonn,cofr,frac,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 26 23:05 EST 2020. Contains 331289 sequences. (Running on oeis4.)