This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A174380 #6 Jun 02 2025 02:44:10
%S A174380 17,3,47,162287,23,257,2486784401,3,33479,83695120256591,5,67,7,3,
%T A174380 443881,100417,859,79,10745792197529,3,92798617729,67,1627,11,
%U A174380 12298336501553,3,19,241,167,3506869732968391733353,5,3,47,5,317
%N A174380 Smallest prime factors of numbers of the form (n-1)^n - n^(n-1) A007925.
%C A174380 For n = 1 to 3 no prime factors in A007925(n).
%t A174380 Table[FactorInteger[(n-1)^n-n^(n-1)][[1,1]],{n,4,40}] (* _Harvey P. Dale_, May 25 2011 *)
%Y A174380 A007925, A174379
%K A174380 nonn
%O A174380 4,1
%A A174380 Torbjorn Alm (talm(AT)tele2.se), Mar 17 2010