A042525 Denominators of continued fraction convergents to sqrt(791).

1, 8, 449, 3600, 202049, 1619992, 90921601, 728992800, 40914518401, 328045140008, 18411442358849, 147619584010800, 8285108146963649, 66428484759719992, 3728280254691283201, 29892670522289985600, 1677717829502930476801, 13451635306545733800008

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, 450, 0, -1).

Formula

G.f.: -(x^2-8*x-1) / (x^4-450*x^2+1). - Colin Barker, Dec 17 2013

Mathematica

Denominator[Convergents[Sqrt[791], 30]] (* Vincenzo Librandi, Jan 23 2014 *)

Crossrefs

Cf. A042524, A040762.

Sequence in context: A240320 A013457 A012740 * A028449 A209840 A187049

Adjacent sequences: A042522 A042523 A042524 * A042526 A042527 A042528

Keyword

nonn,frac,easy

Author

N. J. A. Sloane.

Extensions

More terms from Colin Barker, Dec 17 2013

Status

approved