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A031547 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 49. 0
2403, 2411, 2423, 2427, 2447, 2459, 2467, 2471, 2503, 2531, 2539, 2543, 2547, 2551, 2563, 2571, 2579, 2591, 2599, 9608, 9696, 9704, 9728, 9760, 9824, 9832, 9856, 9888, 9896, 9920, 9928, 9984, 10016, 10048, 10080, 10088, 10144, 10208, 10216, 10240 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..40.

CROSSREFS

Sequence in context: A352730 A031776 A251774 * A031727 A236038 A323271

Adjacent sequences:  A031544 A031545 A031546 * A031548 A031549 A031550

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified May 18 06:28 EDT 2022. Contains 353783 sequences. (Running on oeis4.)