A031587 Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 89.

7923, 7927, 7947, 7951, 7963, 7967, 7971, 8011, 8023, 8039, 8051, 8059, 8067, 8071, 8087, 8107, 8111, 8119, 8123, 8139, 8143, 8147, 8159, 8163, 8167, 8171, 8179, 8187, 8191, 8219, 8227, 8231, 8243, 8259, 8263, 8279, 31688, 31720, 31784, 31880, 31904

Offset

1,1

Links

Table of n, a(n) for n=1..41.

Crossrefs

Sequence in context: A233976 A001228 A036325 * A031767 A250629 A185466

Adjacent sequences: A031584 A031585 A031586 * A031588 A031589 A031590

Keyword

nonn

Author

David W. Wilson

Status

approved