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A042251 Denominators of continued fraction convergents to sqrt(651). 2
1, 1, 2, 33, 35, 68, 3435, 3503, 6938, 114511, 121449, 235960, 11919449, 12155409, 24074858, 397353137, 421427995, 818781132, 41360484595, 42179265727, 83539750322, 1378815270879, 1462355021201, 2841170292080, 143520869625201, 146362039917281 (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, 3470, 0, 0, 0, 0, 0, -1).

FORMULA

G.f.: -(x^4 - x^3 + 2*x^2 + x + 1)*(x^6 - 34*x^3 - 1) / (x^12 - 3470*x^6 + 1). - Colin Barker, Dec 05 2013

MATHEMATICA

Denominator[Convergents[Sqrt[651], 30]] (* Vincenzo Librandi, Jan 18 2014 *)

CROSSREFS

Cf. A042250, A040625.

Sequence in context: A305485 A078732 A305085 * A316736 A199551 A045932

Adjacent sequences:  A042248 A042249 A042250 * A042252 A042253 A042254

KEYWORD

nonn,frac,easy

AUTHOR

N. J. A. Sloane

EXTENSIONS

More terms from Colin Barker, Dec 05 2013

STATUS

approved

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Last modified August 15 16:02 EDT 2020. Contains 336505 sequences. (Running on oeis4.)