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Number of labeled commutative monoids of order n with a fixed identity.
2

%I #18 Feb 17 2022 13:31:40

%S 1,2,9,94,1486,38890,1430442,77291510,7826336608,3904851153672

%N Number of labeled commutative monoids of order n with a fixed identity.

%H <a href="/index/Mo#monoids">Index entries for sequences related to monoids</a>

%F a(n) = A058155(n)/n.

%Y Row sums of A058160.

%Y Cf. A058155.

%K nonn,more

%O 1,2

%A _Christian G. Bower_, Nov 14 2000

%E a(8)-a(9) from _Alex Meiburg_, Oct 20 2021

%E a(10) from _Andrew Howroyd_, Feb 15 2022