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A058158
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Triangle: Labeled monoids of order n with k idempotents with a fixed identity.
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2
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1, 1, 1, 1, 6, 4, 4, 45, 72, 35, 6, 528, 1308, 1676, 604, 80, 19935, 39700, 70170, 62060, 16727, 120, 3599436, 1969470, 3829000, 5167800, 3260382, 681232, 2760
(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; 1,6,4; 4,45,72,35; 6,528,1308,1676,604; ...
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CROSSREFS
| a(n, k)=A058157(n, k)/n. Row sums give A058154. Column 1: A058163.
Sequence in context: A013661 A019174 A019166 * A021159 A106332 A140246
Adjacent sequences: A058155 A058156 A058157 * A058159 A058160 A058161
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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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