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A319791
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Number of non-isomorphic connected set multipartitions (multisets of sets) of weight n with empty intersection.
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5
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1, 0, 0, 0, 1, 3, 14, 38, 125, 360, 1107, 3297, 10292, 32134, 103759, 340566, 1148150, 3951339, 13925330, 50122316, 184365292, 692145409, 2651444318, 10356184440, 41224744182, 167150406897, 689998967755, 2898493498253, 12384852601731, 53804601888559, 237566072006014
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OFFSET
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0,6
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COMMENTS
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The weight of a multiset partition is the sum of sizes of its parts. Weight is generally not the same as number of vertices.
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LINKS
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FORMULA
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EXAMPLE
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Non-isomorphic representatives of the a(4) = 1 through a(6) = 14 set multipartitions:
4: {{1},{2},{1,2}}
5: {{2},{3},{1,2,3}}
{{2},{1,3},{2,3}}
{{1},{2},{2},{1,2}}
6: {{1},{1,4},{2,3,4}}
{{1},{2,3},{1,2,3}}
{{3},{4},{1,2,3,4}}
{{3},{1,4},{2,3,4}}
{{1,2},{1,3},{2,3}}
{{1,3},{2,4},{3,4}}
{{1},{2},{3},{1,2,3}}
{{1},{2},{1,2},{1,2}}
{{1},{2},{1,3},{2,3}}
{{2},{2},{1,3},{2,3}}
{{2},{3},{3},{1,2,3}}
{{2},{3},{1,3},{2,3}}
{{1},{1},{2},{2},{1,2}}
{{1},{2},{2},{2},{1,2}}
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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