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A031698
Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 20.
2
101, 402, 903, 1604, 2505, 3606, 4907, 6408, 8109, 10010, 12111, 14412, 16913, 19614, 22515, 25616, 28917, 32418, 36119, 40020, 44121, 48422, 48862, 52923, 57624, 62525, 67626, 72927, 78428, 84129, 90030, 96131, 102432, 108933, 115634, 122535, 129636
OFFSET
1,1
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..10000
MATHEMATICA
Select[Range[200000], !IntegerQ[Sqrt[#]]&&Min[ContinuedFraction[Sqrt[#]][[2]]]==20&] (* Vincenzo Librandi, Feb 06 2012 *)
CROSSREFS
Different from A055438.
Sequence in context: A327347 A062800 A323178 * A055438 A142692 A060012
KEYWORD
nonn
STATUS
approved