A031572 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 74.

5478, 5494, 5506, 5518, 5522, 5526, 5534, 5542, 5574, 5582, 5602, 5606, 5638, 5666, 5678, 5682, 5686, 5702, 5714, 5718, 5726, 5758, 5762, 5774, 12324, 12333, 12381, 12387, 12417, 12459, 12468, 12477, 12489, 12513, 12606, 12612, 12621, 12633, 12657

Offset

1,1

Links

Table of n, a(n) for n=1..39.

Crossrefs

Sequence in context: A202776 A324215 A234685 * A045108 A251962 A251956

Adjacent sequences: A031569 A031570 A031571 * A031573 A031574 A031575

Keyword

nonn

Author

David W. Wilson

Status

approved