A031517 - OEIS

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A031517

Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 19.

363, 367, 379, 383, 387, 391, 411, 419, 431, 439, 1448, 1480, 1536, 1568, 1576, 1632, 1664, 1696, 1728, 1760, 3255, 3327, 3387, 3543, 3687, 3747, 3759, 3819, 3831, 3903, 3963, 5784, 5912, 5976, 6152, 6168, 6232, 6296, 6424, 6488, 6616, 6744, 6872, 6936

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..44.

CROSSREFS

Sequence in context: A212324 A007565 A098253 * A192449 A116285 A031697

Adjacent sequences: A031514 A031515 A031516 * A031518 A031519 A031520

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved