A110890 Number of spindle configurations of n skew lines, up to isotopy, which are amphichiral.

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)

Links

Table of n, a(n) for n=1..13.

R. Bacher and D. Garber, Spindle configurations of skew lines

Crossrefs

Sequence in context: A140093 A194093 A055314 * A249010 A071534 A336667

Adjacent sequences: A110887 A110888 A110889 * A110891 A110892 A110893

Keyword

more,nonn

Author

David Garber, Sep 20 2005

Status

approved