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A174380 Smallest prime factors of numbers of the form (n-1)^n - n^(n-1) A007925 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,1

COMMENTS

For n = 1 to 3 no prime factors in A007925(n).

LINKS

Table of n, a(n) for n=4..38.

MATHEMATICA

Table[FactorInteger[(n-1)^n-n^(n-1)][[1, 1]], {n, 4, 40}] (* Harvey P. Dale, May 25 2011 *)

CROSSREFS

A007925, A174379

Sequence in context: A336485 A317317 A212602 * A040278 A254326 A040279

Adjacent sequences:  A174377 A174378 A174379 * A174381 A174382 A174383

KEYWORD

nonn

AUTHOR

Torbjorn Alm (talm(AT)tele2.se), Mar 17 2010

STATUS

approved

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Last modified May 14 16:48 EDT 2021. Contains 343898 sequences. (Running on oeis4.)