A031555 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 57.

3251, 3259, 3267, 3271, 3291, 3299, 3307, 3319, 3323, 3331, 3343, 3347, 3359, 3371, 3383, 3391, 3403, 3407, 3411, 3431, 3459, 3463, 3467, 3479, 13000, 13024, 13056, 13088, 13096, 13120, 13152, 13184, 13216, 13256, 13280, 13312, 13352, 13376, 13408

Offset

1,1

Links

Table of n, a(n) for n=1..39.

Crossrefs

Sequence in context: A185840 A251501 A106722 * A106723 A270799 A031735

Adjacent sequences: A031552 A031553 A031554 * A031556 A031557 A031558

Keyword

nonn

Author

David W. Wilson

Status

approved