A020351 Numbers k such that the continued fraction for sqrt(k) has period 12.

46, 76, 103, 127, 184, 213, 236, 239, 247, 263, 276, 295, 304, 329, 351, 355, 364, 366, 369, 386, 426, 428, 429, 460, 479, 512, 535, 558, 605, 609, 636, 640, 688, 708, 717, 734, 748, 767, 775, 802, 815, 820, 824, 832, 851, 864, 887, 995, 1027, 1068, 1071, 1077

Offset

1,1

Links

Robert P. P. McKone, Table of n, a(n) for n = 1..9999

Mathematica

Select[Range[1077], Length[Last[ContinuedFraction[Sqrt[#]]]] == 12 &] (* Robert P. P. McKone, Aug 27 2021, after Alonso del Arte *)

Crossrefs

Contains A237611.

Sequence in context: A167283 A085434 A245372 * A113691 A188598 A363049

Adjacent sequences: A020348 A020349 A020350 * A020352 A020353 A020354

Keyword

nonn

Author

David W. Wilson

Status

approved