A042389 Denominators of continued fraction convergents to sqrt(721).

1, 1, 6, 7, 20, 27, 74, 101, 175, 276, 451, 727, 1178, 20753, 63437, 84190, 147627, 1560460, 7949927, 9510387, 65012249, 74522636, 437625429, 4450776926, 4888402355, 9339179281, 32905940198, 568740162647, 601646102845, 1170386265492, 1772032368337

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, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 37264353886584830, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).

Mathematica

Denominator[Convergents[Sqrt[721], 30]] (* Vincenzo Librandi, Jan 21 2014 *)

Crossrefs

Cf. A042388.

Sequence in context: A081348 A002361 A041185 * A287859 A288649 A287913

Adjacent sequences: A042386 A042387 A042388 * A042390 A042391 A042392

Keyword

nonn,frac,easy

Author

N. J. A. Sloane.

Extensions

More terms from Vincenzo Librandi, Jan 21 2014

Status

approved