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A031416 Numbers n such that continued fraction for sqrt(n) has odd period and central terms 3. +0
1
10, 89, 149, 193, 218, 250, 277, 337, 493, 521, 569, 653, 709, 914, 1009, 1018, 1037, 1385, 1465, 1553, 1597, 1618, 1754, 1781, 1898, 1921, 1973, 1994, 2069, 2129, 2146, 2293, 2378, 2389, 2441, 2474, 2561, 2725, 2741, 2777, 2897, 2957 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A165148 A163030 A000826 this_sequence A120923 A057081 A024132

Adjacent sequences: A031413 A031414 A031415 this_sequence A031417 A031418 A031419

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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