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A020442 Period of continued fraction for sqrt(n) contains exactly six 1's. 0
43, 44, 46, 58, 76, 86, 93, 103, 113, 160, 172, 179, 184, 186, 191, 199, 213, 233, 242, 245, 268, 281, 284, 307, 313, 337, 344, 345, 348, 366, 376, 389, 391, 409, 411, 415, 419, 422, 425, 426, 430, 431, 446, 468, 469, 477, 496, 500, 512, 516, 517, 522, 550, 554, 561 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..55.

MATHEMATICA

Select[ Range@ 565, !IntegerQ[ Sqrt@ #] && Count[ ContinuedFraction[ Sqrt@ #][[2]], 1] == 6 &] (* Robert G. Wilson v, Jul 03 2011 *)

CROSSREFS

Sequence in context: A259089 A165864 A223746 * A041923 A085468 A113819

Adjacent sequences:  A020439 A020440 A020441 * A020443 A020444 A020445

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified May 21 00:36 EDT 2022. Contains 353886 sequences. (Running on oeis4.)