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⇱ The On-Line Encyclopedia of Integer Sequences (OEIS)

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Showing entries 1-10 | older changes
Q(sqrt(n)) has class number 3.
#16 by Charles R Greathouse IV at Mon May 13 01:54:04 EDT 2013
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Mon May 13
01:54
OEIS Server: https://oeis.org/edit/global/1915
#15 by Charles R Greathouse IV at Mon May 13 01:47:48 EDT 2013
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Mon May 13
01:47
OEIS Server: https://oeis.org/edit/global/1914
#14 by T. D. Noe at Mon Oct 22 12:27:09 EDT 2012
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#13 by Arkadiusz Wesolowski at Mon Oct 22 10:11:03 EDT 2012
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#12 by Arkadiusz Wesolowski at Mon Oct 22 10:05:51 EDT 2012
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#11 by Arkadiusz Wesolowski at Mon Oct 22 09:45:48 EDT 2012
CROSSREFS
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#10 by T. D. Noe at Fri Oct 19 15:37:46 EDT 2012
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#9 by Charles R Greathouse IV at Thu Oct 18 15:50:12 EDT 2012
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#8 by Charles R Greathouse IV at Thu Oct 18 15:49:51 EDT 2012
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STATUS
#7 by Joerg Arndt at Thu Oct 18 11:17:48 EDT 2012
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Discussion
Thu Oct 18
13:28
Charles R Greathouse IV: More concise (and 'faster', since factorization is not completed if a square factor is found) is

is(n)=issquarefree(n) && bnfinit('x^2-n).cyc==[3]