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Search: id:A052894
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| 1, 1, 5, 46, 631, 11586, 267369, 7442758, 242833091, 9090987610, 384209125453, 18096001098462, 939991769248239, 53388611049236386, 3291647968944928337, 218948960832551848438, 15629052780600654123739
(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 870
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FORMULA
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E.g.f.: RootOf(-2*_Z+_Z*exp(x*_Z)+1)
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MAPLE
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spec := [S, {C=Set(B, 1 <= card), B=Prod(Z, S), S=Sequence(C)}, labeled]: seq(combstruct[count](spec, size=n), n=0..20);
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CROSSREFS
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Sequence in context: A121631 A071214 A052873 this_sequence A066998 A036246 A000872
Adjacent sequences: A052891 A052892 A052893 this_sequence A052895 A052896 A052897
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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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