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A174380
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Smallest prime factors of numbers of the form (n-1)^n - n^(n-1) A007925
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0
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17, 3, 47, 162287, 23, 257, 2486784401, 3, 33479, 83695120256591, 5, 67, 7, 3, 443881, 100417, 859, 79, 10745792197529, 3, 92798617729, 67, 1627, 11, 12298336501553, 3, 19, 241, 167, 3506869732968391733353, 5, 3, 47, 5, 317
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OFFSET
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4,1
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COMMENTS
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For n = 1 to 3 no prime factors in A007925(n).
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LINKS
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MATHEMATICA
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Table[FactorInteger[(n-1)^n-n^(n-1)][[1, 1]], {n, 4, 40}] (* Harvey P. Dale, May 25 2011 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Torbjorn Alm (talm(AT)tele2.se), Mar 17 2010
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STATUS
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approved
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