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A020441 Period of continued fraction for sqrt(n) contains exactly five 1's. 0
91, 304, 319, 432, 539, 555, 595, 671, 696, 703, 760, 891, 935, 1175, 1512, 1643, 1695, 1971, 2075, 2088, 2223, 2295, 2299, 2507, 2552, 2555, 2679, 2727, 3219, 3240, 3344, 3416, 3471, 3611, 4023, 4075, 4331, 4347, 4371, 5291, 5320, 5355, 5616, 5712, 6016 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..45.

MATHEMATICA

Select[ Range@ 6100, !IntegerQ[ Sqrt@ #] && Count[ ContinuedFraction[ Sqrt@ #][[2]], 1] == 5 &] (* Robert G. Wilson v, Jul 03 2011 *)

CROSSREFS

Sequence in context: A000864 A224460 A350206 * A209255 A273799 A063137

Adjacent sequences:  A020438 A020439 A020440 * A020442 A020443 A020444

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified May 17 03:43 EDT 2022. Contains 353727 sequences. (Running on oeis4.)