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A058144
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Triangle: Self-converse monoids of order n with k idempotents.
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2
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1, 1, 1, 1, 3, 1, 2, 9, 6, 2, 1, 28, 31, 18, 6, 2, 131, 160, 132, 65, 19, 1, 1081, 947, 917, 612, 275, 68, 5
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OFFSET
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1,5
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LINKS
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EXAMPLE
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1; 1,1; 1,3,1; 2,9,6,2; 1,28,31,18,6; ...
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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