A031621 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 33.

2509, 13738, 23185, 61729, 64234, 79813, 80378, 81514, 83233, 98957, 101485, 102761, 147218, 150298, 151073, 152629, 171194, 172021, 175349, 176186, 177866, 178709, 180401, 205033, 231241, 233165, 235097, 238985, 263105, 265157, 267217

Offset

1,1

Links

Table of n, a(n) for n=1..31.

Crossrefs

Subsequence of A003814.

Sequence in context: A251858 A251854 A203055 * A212400 A215197 A250694

Adjacent sequences: A031618 A031619 A031620 * A031622 A031623 A031624

Keyword

nonn

Author

David W. Wilson

Extensions

First term 1090 removed by Georg Fischer, Jun 16 2019

Status

approved