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Search: id:A058142
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| A058142 |
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Triangle: Number of commutative monoids of order n with k idempotents. |
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+0
3
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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; listen)
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OFFSET
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1,5
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LINKS
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Index entries for sequences related to monoids
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EXAMPLE
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1; 1,1; 1,3,1; 2,9,6,2; 1,26,30,16,5; ...
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CROSSREFS
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Row sums give A058131. Main diagonal: A006966. Columns 1, 2: A000688, A058143.
Sequence in context: A152252 A152229 A074308 this_sequence A058144 A132323 A055450
Adjacent sequences: A058139 A058140 A058141 this_sequence A058143 A058144 A058145
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KEYWORD
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nonn,tabl,more
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AUTHOR
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Christian G. Bower (bowerc(AT)usa.net), Nov 14 2000
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