A042319 Denominators of continued fraction convergents to sqrt(686).

1, 5, 21, 26, 47, 167, 381, 3977, 103783, 1041807, 2187397, 7603998, 9791395, 17395393, 79372967, 414260228, 21620904823, 108518784343, 455696042195, 564214826538, 1019910868733, 3623947432737, 8267805734207, 86302004774807, 2252119929879189

Offset

0,2

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, 21700277790, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).

Mathematica

Denominator[Convergents[Sqrt[686], 30]] (* Harvey P. Dale, Jan 15 2012 *)

Crossrefs

Cf. A042318.

Sequence in context: A228141 A268527 A176300 * A302305 A351325 A303965

Adjacent sequences: A042316 A042317 A042318 * A042320 A042321 A042322

Keyword

nonn,frac,easy

Author

N. J. A. Sloane.

Extensions

More terms from Vincenzo Librandi, Jan 20 2014

Status

approved