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A031422 Numbers n such that continued fraction for sqrt(n) has odd period and central terms 9. 0
82, 601, 1073, 1930, 2017, 2621, 2825, 3037, 3533, 3769, 4013, 4714, 5701, 6218, 6373, 6689, 7013, 7757, 8461, 8825, 9197, 9277, 12629, 13394, 13621, 14081, 14549, 15613, 15754, 18265, 18797, 20005, 20282, 20441, 21410, 22277, 22993 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

CROSSREFS

Sequence in context: A031696 A005972 A082972 * A186688 A002309 A128959

Adjacent sequences:  A031419 A031420 A031421 * A031423 A031424 A031425

KEYWORD

nonn

AUTHOR

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

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Last modified February 15 16:56 EST 2012. Contains 205825 sequences.