A031644 Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 56.

38858, 64090, 65617, 96221, 135593, 180001, 227818, 228773, 232613, 233578, 285517, 287657, 348541, 355657, 416554, 425633, 429554, 492026, 493429, 499061, 501889, 503306, 507569, 578329, 663437, 666697, 669965, 673241, 676525, 679817

Offset

1,1

Links

Table of n, a(n) for n=1..30.

Crossrefs

Sequence in context: A204759 A206597 A088237 * A224622 A233955 A250515

Adjacent sequences: A031641 A031642 A031643 * A031645 A031646 A031647

Keyword

nonn

Author

David W. Wilson

Extensions

First term 3137 removed by Georg Fischer, Jun 16 2019

Status

approved