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A004104
Number of self-dual signed graphs with n nodes. Also number of self-complementary 2-multigraphs on n nodes.
(Formerly M1649)
+0
3
1, 1, 2, 6, 20, 86, 662, 8120, 171526, 5909259, 348089533, 33883250874, 5476590066777, 1490141905609371, 666003784522738152, 509204473666338077658, 636051958071749028811326
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.
AT&T Labs Research
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