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A058149
Monoids of order n with 3 idempotents, considered to be equivalent when they are isomorphic or anti-isomorphic (by reversal of the operator).
1
2, 10, 47, 283, 2139
OFFSET
3,1
CROSSREFS
Column 3 of A058147.
Sequence in context: A166107 A034429 A242638 * A009314 A009316 A116194
KEYWORD
nonn,more
AUTHOR
Christian G. Bower, Nov 14 2000
STATUS
approved