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A031587 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. 0
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified January 25 13:57 EST 2022. Contains 350572 sequences. (Running on oeis4.)