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A031768
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Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 90.
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2
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2026, 8102, 18228, 32404, 50630, 72906, 99232, 129608, 164034, 202510, 245036, 291612, 342238, 396914, 455640, 518416, 585242, 656118, 731044, 810020, 893046, 980122, 1071248, 1166424, 1265650, 1368926, 1476252, 1587628, 1703054, 1822530
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OFFSET
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1,1
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COMMENTS
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In fact the first term not of the form A156856(n)=(45n)^2+n is a(93) = 17147972, with contfrac(sqrt(17147972)) = [4141; [91, 90, 91, 8282]]. - M. F. Hasler, Feb 21 2009
The first term not of the form A156856(n)=(45n)^2+n is a(93) = 17147972, with contfrac(sqrt(17147972)) = [4141; [91, 90, 91, 8282]]. - M. F. Hasler, Feb 21 2009
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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