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A031427 Least term in period of continued fraction for sqrt(n) is 3. 1
11, 40, 87, 128, 152, 232, 235, 266, 300, 335, 336, 373, 455, 498, 544, 592, 747, 848, 860, 914, 920, 1110, 1111, 1248, 1320, 1392, 1393, 1547, 1700, 1707, 1708, 1790, 1792, 1876, 1953, 2055, 2240, 2335, 2336, 2632, 2635, 2829, 2844, 2952 (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 1000 from Vincenzo Librandi)

MATHEMATICA

Select[Range[3000], !IntegerQ[Sqrt[#]] && Min[ContinuedFraction[Sqrt[#]][[2]]] == 3&] (* Vincenzo Librandi, Feb 06 2012 *)

CROSSREFS

Sequence in context: A122014 A342833 A335491 * A147296 A337130 A059142

Adjacent sequences:  A031424 A031425 A031426 * A031428 A031429 A031430

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified May 13 02:36 EDT 2021. Contains 343836 sequences. (Running on oeis4.)