A031627 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 39.

9629, 31057, 31765, 32122, 66733, 86074, 110513, 111178, 112514, 114533, 138745, 140237, 168541, 170185, 173497, 203029, 205738, 209378, 238769, 239746, 241706, 242689, 243674, 244661, 246641, 248629, 249626, 323465, 325741, 328025

Offset

1,1

Links

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

Crossrefs

Subsequence of A003814.

Sequence in context: A254418 A254425 A237231 * A252128 A237674 A183851

Adjacent sequences: A031624 A031625 A031626 * A031628 A031629 A031630

Keyword

nonn

Author

David W. Wilson

Extensions

First term 1522 removed by Georg Fischer, Jun 16 2019

Status

approved