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A253948
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Number of finite, negative, Archimedean, commutative, totally ordered monoids of size n (semi-groups with a neutral element that is also the top element).
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2
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1, 1, 1, 2, 6, 22, 95, 471, 2670, 17387, 131753, 1184059, 12896589
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OFFSET
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1,4
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COMMENTS
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Also number of Archimedean triangular norms on an n-chain.
The terms have been computed using the algorithm described in the referenced papers.
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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