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A058134
Number of asymmetric commutative monoids (semigroups with identity) of order n.
+0
2
1, 2, 4, 13, 49, 247, 1486
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.
AT&T Labs Research
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