A031547 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 49.

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

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