A031525 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 27.

731, 739, 743, 751, 771, 779, 787, 803, 811, 823, 827, 839, 2920, 2944, 2976, 2984, 3016, 3040, 3072, 3104, 3112, 3168, 3176, 3200, 3232, 3264, 3272, 3328, 3360, 6567, 6627, 6639, 6711, 6843, 6855, 6915, 6927, 6999, 7071, 7143, 7287, 7431, 7563, 11672

Offset

1,1

Links

Table of n, a(n) for n=1..44.

Crossrefs

Sequence in context: A259322 A085441 A098292 * A373192 A031705 A158396

Adjacent sequences: A031522 A031523 A031524 * A031526 A031527 A031528

Keyword

nonn

Author

David W. Wilson

Status

approved