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A057771
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Number of loops (quasigroups with an identity element) of order n.
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11
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1, 1, 1, 2, 6, 109, 23746, 106228849, 9365022303540, 20890436195945769617, 1478157455158044452849321016
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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REFERENCES
| A. Hulpke, P. Kaski and P. R. J. Ostergard, The number of Latin squares of order 11, Preprint, 2009.
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LINKS
| Index entries for sequences related to quasigroups
B. D. McKay, A. Meynert and W. Myrvold, Small Latin Squares, Quasigroups and Loops, J. Combin. Designs, to appear (2005).
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CROSSREFS
| Cf. A000315, A057991-A057994, A057996, A057995, A089925.
Sequence in context: A099790 A181036 A059088 * A056164 A156500 A075391
Adjacent sequences: A057768 A057769 A057770 * A057772 A057773 A057774
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KEYWORD
| nonn,more,nice
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AUTHOR
| Christian G. Bower (bowerc(AT)usa.net), Nov 01 2000
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EXTENSIONS
| a(8) from Juergen Buntrock (jubu(AT)jubu.com), Nov 03 2003.
Two more terms (from the McKay-Meynert-Myrvold article) from Richard Bean (rwb(AT)eskimo.com), Feb 17 2004
There are 1478157455158044452849321016 isomorphism classes of loops of order 11. - Petteri Kaski (petteri.kaski(AT)cs.helsinki.fi), Sep 18 2009
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