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Search: id:A052815
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| 0, 1, 2, 5, 16, 56, 221, 900, 3839, 16752, 74701, 338327, 1553181, 7208191, 33768389, 159463655, 758291989, 3627890869, 17450572584, 84342086908, 409394388458
(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 780
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MAPLE
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spec := [S, {B=Prod(C, Z), C=Sequence(S), S=Cycle(B)}, unlabeled]: seq(combstruct[count](spec, size=n), n=0..20);
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CROSSREFS
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Sequence in context: A149977 A147771 A052891 this_sequence A082789 A072110 A114296
Adjacent sequences: A052812 A052813 A052814 this_sequence A052816 A052817 A052818
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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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Search completed in 0.002 seconds
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