The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A031697 Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 19. 1
 363, 1448, 3255, 5784, 9035, 13008, 17703, 23120, 29259, 36120, 43703, 52008, 61035, 70784, 81255, 92448, 104363, 117000, 130359, 137680, 144440, 152920, 159243, 174768, 191015, 207984, 225675, 244088, 263223, 283080, 303659, 314780, 324960 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS (19*m)^2 + 2*m for m >= 1 are terms of this sequence (see comment in A031749). The first term that is not of this form is a(20) = 137680. - Chai Wah Wu, Jun 19 2016 LINKS Charles R Greathouse IV, Table of n, a(n) for n = 1..10000 (first 60 terms from Vincenzo Librandi) MATHEMATICA Select[Range[350000], !IntegerQ[Sqrt[#]] &&Min[ContinuedFraction[Sqrt[#]][[2]]] == 19&](* Vincenzo Librandi, Feb 10 2012 *) CROSSREFS Sequence in context: A031517 A192449 A116285 * A158309 A098251 A115464 Adjacent sequences:  A031694 A031695 A031696 * A031698 A031699 A031700 KEYWORD nonn AUTHOR STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 16 02:09 EDT 2022. Contains 353687 sequences. (Running on oeis4.)