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Search: id:A052842
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| 0, 1, 3, 23, 290, 5104, 115374, 3185972, 103946688, 3912527016, 166884627360, 7955159511672, 419106982360560, 24182042474691984, 1516563901865906880, 102717031449780063360, 7472238163167018081024
(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 809
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MAPLE
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spec := [S, {C=Prod(Z, B), S=Cycle(C), B=Sequence(S)}, labeled]: seq(combstruct[count](spec, size=n), n=0..20);
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CROSSREFS
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Sequence in context: A004700 A006555 A060090 this_sequence A088692 A129458 A118184
Adjacent sequences: A052839 A052840 A052841 this_sequence A052843 A052844 A052845
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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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