OFFSET
1,1
COMMENTS
a(n) = 0 for multiples of 3.
See also A048954 for a different definition.
LINKS
D. Ford and V. Jha, On Wendt's determinant and Sophie Germain's Theorem, Experiment. Math., Volume 2, Issue 2 (1993), 113-120.
PROG
(PARI) a(n)=polresultant(x^n-1, (-1-x)^n-1, x)
CROSSREFS
KEYWORD
sign
AUTHOR
Ralf Stephan, Aug 01 2004
STATUS
approved