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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
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,5
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LINKS
| Index entries for sequences related to monoids
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EXAMPLE
| 1; 1,1; 1,3,1; 2,9,6,2; 1,28,31,18,6; ...
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CROSSREFS
| Row sums give A058132. Main diagonal: A058122(n-1). Columns 1-3: A000001, A058145, A058146.
Sequence in context: A152229 A074308 A058142 * A132323 A055450 A185835
Adjacent sequences: A058141 A058142 A058143 * A058145 A058146 A058147
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KEYWORD
| nonn,tabl,more
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AUTHOR
| Christian G. Bower (bowerc(AT)usa.net), Nov 14 2000
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