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Search: id:A052772
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| 0, 1, 4, 22, 156, 1193, 9748, 82916, 727088, 6524084, 59620732, 552970626, 5191935808, 49252903050, 471358286352, 4545310993994, 44121116086052, 430777978197156, 4227634212037728, 41680927531643928
(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 729
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MAPLE
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spec := [S, {S=Prod(Z, B, B, B, B), B=PowerSet(S)}, unlabeled]: seq(combstruct[count](spec, size=n), n=0..20);
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CROSSREFS
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Sequence in context: A000307 A049376 A083410 this_sequence A052650 A112697 A113717
Adjacent sequences: A052769 A052770 A052771 this_sequence A052773 A052774 A052775
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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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