The On-Line Encyclopedia of Integer Sequences (OEIS)

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A051986

Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 21.
(history; published version)

#7 by Alois P. Heinz at Tue Sep 21 07:09:20 EDT 2021

STATUS

proposed

approved

#6 by Georg Fischer at Tue Sep 21 07:03:20 EDT 2021

STATUS

editing

proposed

#5 by Georg Fischer at Tue Sep 21 07:03:13 EDT 2021

LINKS

Georg Fischer, <a href="/A051986/b051986.txt">Table of n, a(n) for n = 1..59</a>

KEYWORD

nonn,fini,full

STATUS

approved

editing

#4 by Russ Cox at Fri Mar 30 16:48:43 EDT 2012

AUTHOR

_N. J. A. Sloane (njas(AT)research.att.com), _, Jan 04 2000

Discussion

Fri Mar 30

16:48

OEIS Server: https://oeis.org/edit/global/110

#3 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010

OFFSET

0,1,1

KEYWORD

nonn,fini,new

#2 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

KEYWORD

nonn,fini,new

AUTHOR

N. J. A. Sloane (njas, (AT)research.att.com), Jan 04 2000

#1 by N. J. A. Sloane at Mon May 08 03:00:00 EDT 2000

NAME

Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 21.

DATA

394, 865, 1769, 1985, 2561, 2762, 3098, 4385, 5465, 5485, 5965, 6122, 7141, 7265, 10565, 11101, 11485, 11581, 13285, 13466, 14381, 14765, 16442, 21365, 22565, 28373, 34493, 35197, 36221, 44861, 47477, 48485, 48941, 51365, 54317

OFFSET

0,1

REFERENCES

R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A, Table A3.

CROSSREFS

Cf. A051966-A051989.

KEYWORD

nonn,fini

AUTHOR

njas, Jan 04 2000

STATUS

approved