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Search: id:A052806
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| 1, 1, 2, 4, 9, 20, 46, 107, 252, 597, 1425, 3418, 8235, 19910, 48287, 117412, 286150, 698771, 1709403, 4188258, 10276221
(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 767
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MAPLE
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spec := [S, {C=Prod(B, Z), B=PowerSet(C), S=Sequence(C)}, unlabeled]: seq(combstruct[count](spec, size=n), n=0..20);
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CROSSREFS
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Sequence in context: A000968 A005908 A085748 this_sequence A110198 A104508 A036623
Adjacent sequences: A052803 A052804 A052805 this_sequence A052807 A052808 A052809
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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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