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A041583 Denominators of continued fraction convergents to sqrt(309). 2
1, 1, 2, 5, 7, 19, 83, 102, 185, 287, 2481, 15173, 17654, 191713, 209367, 1447915, 11792687, 13240602, 25033289, 38273891, 178128853, 394531597, 572660450, 1539852497, 2112512947, 3652365444, 126292938043, 129945303487, 256238241530, 642421786547 (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, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128405450990, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).

FORMULA

a(n) = 128405450990*a(n-26) - a(n-52) for n>51. - Vincenzo Librandi, Dec 20 2013

MATHEMATICA

Denominator[Convergents[Sqrt[309], 30]] (* Vincenzo Librandi, Dec 20 2013 *)

CROSSREFS

Cf. A041582.

Sequence in context: A071198 A041387 A096146 * A143915 A309542 A327322

Adjacent sequences:  A041580 A041581 A041582 * A041584 A041585 A041586

KEYWORD

nonn,frac,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Vincenzo Librandi, Dec 20 2013

STATUS

approved

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Last modified January 28 00:32 EST 2020. Contains 331313 sequences. (Running on oeis4.)