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Search: id:A001493
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| A001493 |
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Number of fixed-point-free permutation groups of degree n. |
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+0
4
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| 1, 0, 1, 2, 7, 8, 37, 40, 200, 258, 1039, 1501, 7629
(list; graph; listen)
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OFFSET
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0,4
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REFERENCES
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Alexander Hulpke, Konstruktion transitiver Permutationsgruppen, Dissertation, RWTH Aachen, 1996.
A. Hulpke, Constructing transitive permutation groups, J. Symbolic Comput. 39 (2005), 1-30.
A. Hulpke, Constructing Transitive Permutation Groups, in preparation
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LINKS
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A. Hulpke, Transitive groups of small degree
Index entries for sequences related to groups
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FORMULA
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a(n)=A000638(n)-A000638(n-1). (Christian G. Bower (bowerc(AT)usa.net), Feb 23 2006)
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CROSSREFS
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Cf. A000019, A002106. Unlabeled version of A116693.
Adjacent sequences: A001490 A001491 A001492 this_sequence A001494 A001495 A001496
Sequence in context: A081700 A093795 A000637 this_sequence A081999 A011355 A021362
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KEYWORD
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nonn,hard,nice
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AUTHOR
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Alexander Hulpke (Alexander.Hulpke(AT)Math.RWTH-Aachen.DE)
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EXTENSIONS
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a(2) and a(10) corrected, a(11) and a(12) added by Christian G. Bower (bowerc(AT)usa.net), Feb 23 2006
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