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Search: id:A051683
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| 1, 2, 4, 6, 12, 18, 24, 48, 72, 96, 120, 240, 360, 480, 600, 720, 1440, 2160, 2880, 3600, 4320, 5040, 10080, 15120, 20160, 25200, 30240, 35280, 40320, 80640, 120960, 161280, 201600, 241920, 282240, 322560, 362880, 725760, 1088640, 1451520
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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This table provides a basis for mapping permutations to natural numbers. For example,associate n!k with the following cycles: (12) (23) (123) (34) (234) (1234) (45) (345) (2345) (12345) etc. - Alford Arnold (Alford1940(AT)aol.com), Sep 29 2006
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EXAMPLE
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Table begins
1
2 4
6 12 18
24 48 72 96 ...
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CROSSREFS
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Cf. A000142, row sums give A001286(n+1).
Adjacent sequences: A051680 A051681 A051682 this_sequence A051684 A051685 A051686
Sequence in context: A018189 A072121 A060735 this_sequence A007436 A052847 A052823
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KEYWORD
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easy,nice,nonn,tabl
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AUTHOR
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Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de)
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