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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

User: Takao Ito

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Takao Ito has authored 1 sequences.

A240950 Numbers k such that the continued fraction for sqrt(k) has odd period, omitting those values of k of the form m^2+1.

Original entry on oeis.org

13, 29, 41, 53, 58, 61, 73, 74, 85, 89, 97, 106, 109, 113, 125, 130, 137, 149, 157, 173, 181, 185, 193, 202, 218, 229, 233, 241, 250, 265, 269, 274, 277, 281, 293, 298, 313, 314, 317, 337, 338, 346, 349, 353, 365, 370, 373, 389, 394, 397, 409, 421, 425, 433
Offset: 1

Author

Takao Ito, Aug 04 2014

Keywords

Comments

p^2 - n*q^2 = -1 is solvable for integers p and q.
A031396 is the union of this sequence with A002522.

Examples

			sqrt(13) = [3;1,1,1,1,6].
sqrt(29) = [5;2,1,1,2,10].
		

Crossrefs

Extensions

More terms from Colin Barker, Dec 18 2014