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A031581 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 83. 0
6891, 6899, 6907, 6911, 6939, 6947, 6959, 6963, 6967, 6971, 6983, 6987, 6991, 7011, 7019, 7027, 7031, 7039, 7043, 7079, 7083, 7103, 7123, 7127, 7131, 7139, 7151, 7159, 7179, 7187, 7199, 7207, 7211, 7219, 7223, 27560, 27648, 27680, 27688, 27744, 27752 (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: A345862 A062678 A018848 * A031761 A184791 A184787

Adjacent sequences:  A031578 A031579 A031580 * A031582 A031583 A031584

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified January 29 05:09 EST 2022. Contains 350672 sequences. (Running on oeis4.)