login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A031709 Least term in period of continued fraction for sqrt(n) is 31. 1
963, 3848, 8655, 15384, 24035, 34608, 47103, 61520, 77859, 96120, 116303, 138408, 162435, 188384, 216255, 246048, 277763, 311400, 346959, 384440, 423843, 465168, 508415, 553584, 600675, 649688, 700623, 753480, 808259, 864960, 923583, 954592 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000 (first 112 terms from Vincenzo Librandi)

MATHEMATICA

cfmt31Q[n_]:=Module[{s=Sqrt[n]}, !IntegerQ[s]&&Min[ContinuedFraction[s][[2]]]==31]; Select[Range[1000000], cfmt31Q] (* Harvey P. Dale, Jul 12 2014 *)

Select[Range[10^7], !IntegerQ[Sqrt[#]] && Min[ContinuedFraction[Sqrt[#]] [[2]]] == 31 & ] (* Vincenzo Librandi, Jun 21 2016 *)

CROSSREFS

Sequence in context: A158414 A031740 A031529 * A158413 A252413 A267973

Adjacent sequences:  A031706 A031707 A031708 * A031710 A031711 A031712

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 25 05:01 EST 2020. Contains 332217 sequences. (Running on oeis4.)