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A031564 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 66. 0
4358, 4374, 4382, 4386, 4406, 4414, 4418, 4434, 4454, 4462, 4478, 4482, 4486, 4502, 4518, 4526, 4534, 4546, 4562, 4566, 4574, 4598, 4614, 4622, 9804, 9813, 9876, 9897, 9903, 9921, 9942, 9957, 9969, 9993, 10014, 10029, 10041, 10077, 10101, 10113, 10119 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..41.

CROSSREFS

Sequence in context: A176111 A164517 A125825 * A347603 A217345 A140937

Adjacent sequences: A031561 A031562 A031563 * A031565 A031566 A031567

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified January 31 21:46 EST 2023. Contains 359981 sequences. (Running on oeis4.)