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A086502
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Number of ordered pairs (a,b) of elements of the symmetric group S_n such that the pair a,b generates a proper subgroup of S_n.
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0
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0, 1, 18, 360, 7560, 289440, 9828000, 631169280, 46449002880, 4526271187200, 524461965350400, 74044329341875200, 12211524764030592000
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OFFSET
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1,3
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LINKS
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FORMULA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Yuval Dekel (dekelyuval(AT)hotmail.com), Sep 09 2003
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EXTENSIONS
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STATUS
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approved
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