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A057991
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Number of quasigroups of order n.
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9
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1, 1, 1, 5, 35, 1411, 1130531, 12198455835, 2697818331680661, 15224734061438247321497, 2750892211809150446995735533513, 19464657391668924966791023043937578299025
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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REFERENCES
| A. Hulpke, P. Kaski and P. R. J. Ostergard, The number of Latin squares of order 11, Preprint, 2009.
D. S. Stones, The pariy of the number of quasigroups, Discr. Math., 310 (2010), 3033-3039. [From N. J. A. Sloane, Sep 25 2010]
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LINKS
| B. D. McKay, A. Meynert and W. Myrvold, Small Latin Squares, Quasigroups and Loops, J. Combin. Designs, to appear (2005).
Index entries for sequences related to quasigroups
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CROSSREFS
| Cf. A002860, A057992-A057994, A057771, A057996.
Sequence in context: A053420 A001802 A122590 * A099137 A000871 A035416
Adjacent sequences: A057988 A057989 A057990 * A057992 A057993 A057994
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KEYWORD
| nonn,more
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AUTHOR
| Christian G. Bower (bowerc(AT)usa.net), Nov 01 2000
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EXTENSIONS
| More terms (from the McKay-Meynert-Myrvold article) from Richard Bean (rwb(AT)eskimo.com), Feb 17 2004
There are 19464657391668924966791023043937578299025 isomorphism classes of quasigroups of order 11. - Petteri Kaski (petteri.kaski(AT)cs.helsinki.fi), Sep 18 2009
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