A042230 Numerators of continued fraction convergents to sqrt(641).

25, 76, 481, 557, 5494, 17039, 22533, 84638, 107171, 620493, 727664, 1348157, 7468449, 8816606, 33918267, 42734873, 162122886, 1501840847, 1663963733, 11485623245, 36120833468, 1817527296645, 5488702723403

Offset

0,1

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, 72241666936, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).

Mathematica

Numerator[Convergents[Sqrt[641], 30]] (* Harvey P. Dale, Dec 13 2011 *)

Crossrefs

Cf. A042231.

Sequence in context: A042226 A042224 A042228 * A189642 A221309 A192504

Adjacent sequences: A042227 A042228 A042229 * A042231 A042232 A042233

Keyword

nonn,cofr,frac,easy

Author

N. J. A. Sloane.

Status

approved