A031663 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 75.

69218, 114325, 116362, 171517, 173177, 238313, 242233, 317194, 320581, 322849, 409889, 510157, 513017, 515885, 518761, 621385, 624541, 634057, 748754, 757429, 760913, 762658, 882346, 886106, 887989, 895541, 1037053, 1184585

Offset

1,1

Links

Table of n, a(n) for n=1..28.

Crossrefs

Sequence in context: A354194 A096551 A096552 * A105010 A190379 A205758

Adjacent sequences: A031660 A031661 A031662 * A031664 A031665 A031666

Keyword

nonn

Author

David W. Wilson

Extensions

First term 5626 removed by Georg Fischer, Jun 16 2019

Status

approved