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A031555 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. 0
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified February 6 23:12 EST 2023. Contains 360111 sequences. (Running on oeis4.)