A042223 Denominators of continued fraction convergents to sqrt(637).

1, 4, 21, 46, 67, 247, 314, 561, 7046, 113297, 120343, 353983, 474326, 7943199, 95792714, 103735913, 199528627, 702321794, 901850421, 2506022636, 13431963601, 56233877040, 2825125815601, 11356737139444, 59608811512821, 130574360165086

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, 0, 0, 0, 0, 0, 0, 2838557779202, 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[637], 30]] (* Vincenzo Librandi, Jan 17 2014 *)

Crossrefs

Cf. A042222.

Sequence in context: A273847 A306048 A266149 * A317225 A273780 A033569

Adjacent sequences: A042220 A042221 A042222 * A042224 A042225 A042226

Keyword

nonn,frac,easy

Author

N. J. A. Sloane

Extensions

More terms from Vincenzo Librandi, Jan 17 2014

Status

approved