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A031425 Least term in period of continued fraction for sqrt(n) is 1. 1
3, 7, 8, 13, 14, 15, 19, 21, 22, 23, 24, 29, 31, 32, 33, 34, 35, 43, 44, 45, 46, 47, 48, 52, 53, 54, 57, 58, 59, 60, 61, 62, 63, 67, 69, 70, 71, 73, 74, 75, 76, 77, 78, 79, 80, 85, 86, 88, 91, 92, 93, 94, 95, 96, 97, 98, 99, 103, 106, 107, 108, 109, 111, 112 (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

MATHEMATICA

Select[Range[200], !IntegerQ[Sqrt[#]]&&Min[ContinuedFraction[Sqrt[#]][[2]]]==1&] (* Vincenzo Librandi, Feb 06 2012 *)

CROSSREFS

Sequence in context: A134258 A028972 A153030 * A063657 A108575 A153219

Adjacent sequences:  A031422 A031423 A031424 * A031426 A031427 A031428

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified May 9 07:54 EDT 2021. Contains 343692 sequences. (Running on oeis4.)