OFFSET
1,10
COMMENTS
a(n) is -(-1)^(n(n+1)/2) times the number of inequivalent elements of norm n in Z[sqrt{6}].
LINKS
Jeremy Lovejoy, Overpartitions and real quadratic fields, J. Number Theory, 106 (2004), 178-186.
CROSSREFS
KEYWORD
sign
AUTHOR
Jeremy Lovejoy, Jun 12 2009
STATUS
approved