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%I
%S 1,1,4,20,114,710,4726,33157,243048,1850817,14590692
%N Number of labeled totally ordered commutative semigroups.
%H Petr Gajdoš and Martin Kuřil, <a href="https://doi.org/10.1007/s00233-014-9602-3">Ordered semigroups of size at most 7 and linearly ordered semigroups of size at most 10</a>, Semigroup Forum, 89 (2014), 639-663.
%Y Cf. A023815.
%K nonn,hard,more
%O 0,3
%A _Peter Jipsen_, Jul 15 2021
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