A031633 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 45.

13021, 25013, 41290, 42106, 42517, 63625, 146978, 150058, 150833, 152389, 183545, 185261, 186985, 188717, 228925, 268853, 273013, 274058, 276154, 320981, 323249, 327809, 328954, 330101, 372829, 385129, 428557, 433805, 441737, 489562

Offset

1,1

Links

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

Crossrefs

Sequence in context: A354510 A138762 A139777 * A015327 A210016 A079230

Adjacent sequences: A031630 A031631 A031632 * A031634 A031635 A031636

Keyword

nonn

Author

David W. Wilson

Extensions

First term 2026 removed by Georg Fischer, Jun 16 2019

Status

approved