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A076019 Number of nonisomorphic commutative systems with n elements having with one binary operation satisfying the equation B(AB)=A (semisymmetric quasigroups). +0
1
1, 1, 2, 2, 1, 3, 3, 13, 12 (list; graph; listen)
OFFSET

1,3
CROSSREFS

Cf. A076016-A076021.

Sequence in context: A117894 A109380 A011020 this_sequence A071453 A080242 A035317

Adjacent sequences: A076016 A076017 A076018 this_sequence A076020 A076021 A076022

KEYWORD

nonn

AUTHOR

Richard Schroeppel (rschroe(AT)sandia.gov), Oct 29 2002

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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