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Search: id:A052523
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| A052523 |
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Number of unlabeled mobiles with cycles of length at least 3. |
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+0
1
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| 0, 1, 0, 1, 1, 2, 3, 6, 12, 25, 53, 114, 257, 567, 1294, 2944, 6790, 15693, 36598, 85578, 201299
(list; graph; listen)
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OFFSET
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0,6
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LINKS
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INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 91
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MAPLE
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spec := [S, {S=Union(B, Z), B=Cycle(S, 3 <= card)}, unlabeled]: seq(combstruct[count](spec, size=n), n=0..20);
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CROSSREFS
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Sequence in context: A116380 A004111 A032235 this_sequence A086625 A001677 A024422
Adjacent sequences: A052520 A052521 A052522 this_sequence A052524 A052525 A052526
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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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