A042691 Denominators of continued fraction convergents to sqrt(875).

1, 1, 2, 5, 7, 12, 19, 31, 112, 143, 255, 398, 653, 1704, 2357, 4061, 237895, 241956, 479851, 1201658, 1681509, 2883167, 4564676, 7447843, 26908205, 34356048, 61264253, 95620301, 156884554, 409389409, 566273963, 975663372, 57154749539, 58130412911, 115285162450

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, 240252, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).

Formula

a(n) = 240252*a(n-16) - a(n-32) for n>31. - Vincenzo Librandi, Jan 26 2014

Mathematica

Denominator/@Convergents[Sqrt[875], 30]  (* Harvey P. Dale, Apr 04 2011 *)

Crossrefs

Cf. A040845, A042690.

Sequence in context: A117538 A001060 A042343 * A112732 A331529 A042065

Adjacent sequences: A042688 A042689 A042690 * A042692 A042693 A042694

Keyword

nonn,frac,easy

Author

N. J. A. Sloane.

Extensions

More terms from Vincenzo Librandi, Jan 26 2014

Status

approved