A031583 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 85.

7227, 7243, 7247, 7251, 7283, 7299, 7307, 7323, 7327, 7331, 7339, 7343, 7351, 7387, 7399, 7403, 7411, 7443, 7451, 7459, 7463, 7467, 7471, 7487, 7491, 7499, 7507, 7519, 7523, 7547, 7559, 7567, 28904, 28960, 28992, 29000, 29024, 29056, 29088, 29096

Offset

1,1

Links

Table of n, a(n) for n=1..40.

Crossrefs

Sequence in context: A346594 A202402 A206469 * A031763 A272160 A093224

Adjacent sequences: A031580 A031581 A031582 * A031584 A031585 A031586

Keyword

nonn

Author

David W. Wilson

Status

approved