A031581 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 83.

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

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,changed

Author

David W. Wilson

Status

approved