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A058113
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Triangle: Number of asymmetric semigroups of order n with k idempotents.
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3
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1, 2, 1, 3, 9, 3, 11, 37, 52, 12, 112, 224, 434, 383, 68, 4398, 1984, 3976, 5568, 3256, 502, 1181185, 47622, 44581, 74851, 74604, 31881, 4158
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| Index entries for sequences related to semigroups
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EXAMPLE
| 1; 2,1; 3,9,3; 11,37,52,12; 112,224,434,383,68; ...
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CROSSREFS
| Row sums give A058104. Main diagonal: A058115. Column 1: A058114.
Sequence in context: A083782 A076240 A099644 * A126009 A091858 A070165
Adjacent sequences: A058110 A058111 A058112 * A058114 A058115 A058116
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KEYWORD
| nonn,tabl,hard
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AUTHOR
| Christian G. Bower (bowerc(AT)usa.net), Nov 09 2000
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EXTENSIONS
| Updated Feb 19 2001
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