OFFSET
1,6
COMMENTS
A006641 is the same except it is under the action of SL_2[Z].
LINKS
S. R. Finch, Class number theory
Steven R. Finch, Class number theory [Cached copy, with permission of the author]
Jens Jonasson, Classes of integral binary quadratic forms, Master's thesis (2001), Appendix B.
EXAMPLE
D = -3, -4, -7, -8, -11, -15, -19, -20, -23, -24, -31, ...,
that is, A003657 negated.
CROSSREFS
KEYWORD
nonn
AUTHOR
Steven Finch, May 05 2005
STATUS
approved