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Search: id:A052843
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| 1, 1, 2, 3, 6, 10, 20, 38, 79, 162, 348, 751, 1661, 3695, 8335, 18919, 43310, 99664, 230700, 536327, 1252298
(list; graph; listen)
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OFFSET
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0,3
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LINKS
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INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 811
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MAPLE
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spec := [S, {C=Prod(Z, B), B=PowerSet(C), S=Set(C)}, unlabeled]: seq(combstruct[count](spec, size=n), n=0..20);
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CROSSREFS
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Sequence in context: A003214 A123423 A005195 this_sequence A120707 A047111 A106741
Adjacent sequences: A052840 A052841 A052842 this_sequence A052844 A052845 A052846
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KEYWORD
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easy,nonn
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AUTHOR
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encyclopedia(AT)pommard.inria.fr, Jan 25 2000
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