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A058142
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Triangle: Number of commutative 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, 26, 30, 16, 5, 1, 98, 142, 111, 54, 15, 1, 455, 718, 713, 482, 215, 53, 3
(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; 1,26,30,16,5; ...
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CROSSREFS
| Row sums give A058131. Main diagonal: A006966. Columns 1, 2: A000688, A058143.
Sequence in context: A152252 A152229 A074308 * A058144 A132323 A055450
Adjacent sequences: A058139 A058140 A058141 * A058143 A058144 A058145
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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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