A031686 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 98.

119074, 196330, 198106, 291721, 293885, 296057, 407213, 409769, 412333, 550789, 697514, 700858, 1069597, 1272913, 1277429, 1284218, 1503701, 1506154, 1508609, 1511066, 1518449, 1523381, 1528321, 1530794, 1764313, 2022925, 2028617

Offset

1,1

Links

Table of n, a(n) for n=1..27.

Crossrefs

Sequence in context: A253874 A253540 A157736 * A262510 A262509 A263083

Adjacent sequences: A031683 A031684 A031685 * A031687 A031688 A031689

Keyword

nonn

Author

David W. Wilson

Extensions

First term 9605 removed by Georg Fischer, Jun 16 2019

Status

approved