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A110890
Number of spindle configurations of n skew lines, up to isotopy, which are amphichiral.
0
1, 1, 0, 1, 1, 3, 0, 12, 5, 83, 0, 808, 47
OFFSET
1,6
COMMENTS
a(n)=0 for n=3 (mod 4)
CROSSREFS
Sequence in context: A140093 A194093 A055314 * A249010 A071534 A336667
KEYWORD
more,nonn
AUTHOR
David Garber, Sep 20 2005
STATUS
approved