A042651 Denominators of continued fraction convergents to sqrt(855).

1, 4, 25, 104, 6057, 24332, 152049, 632528, 36838673, 147987220, 924761993, 3847035192, 224052803129, 900058247708, 5624402289377, 23397667405216, 1362689111791905, 5474154114572836, 34207613799228921, 142304609311488520, 8287874953865563081

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, 6082, 0, 0, 0, -1).

Formula

G.f.: -(x^2-4*x-1)*(x^4+26*x^2+1) / ((x^4-78*x^2+1)*(x^4+78*x^2+1)). - Colin Barker, Dec 20 2013

Mathematica

Denominator[Convergents[Sqrt[855], 30]] (* Vincenzo Librandi, Jan 26 2014 *)

Crossrefs

Cf. A042650, A040825.

Sequence in context: A082044 A167889 A329495 * A225692 A359524 A070764

Adjacent sequences: A042648 A042649 A042650 * A042652 A042653 A042654

Keyword

nonn,frac,easy

Author

N. J. A. Sloane.

Extensions

More terms from Colin Barker, Dec 20 2013

Status

approved