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 A247871 #11 Jun 02 2025 10:15:02 %S A247871 5,5,11,7,5,7,5,17,11,13,5,7,5,7,5,13,17,5,11,5,7,5,29,7,5,23,19,5,7, %T A247871 13,5,11,7,5,17,5,13,11,19,5,23,7,31,5,11,7,5,5,7,19,11,5,41,13,7,23, %U A247871 5,17,5,29,37,5,19,7,5,11,17,7,5,23,13,5,7,11,5,7,5,13,41,11,43,5,31,37,5,7,11,5,17,7,5,5,7,13,29,5 %N A247871 Least prime factor of A247679. %H A247871 Odimar Fabeny, <a href="/A247871/b247871.txt">Table of n, a(n) for n = 1..10000</a> %t A247871 FactorInteger[#][[1,1]]&/@Select[Range[17,4000,18],CompositeQ] (* _Harvey P. Dale_, Jun 19 2022 *) %Y A247871 Cf. A056608, A247679. %K A247871 nonn,easy %O A247871 1,1 %A A247871 _Odimar Fabeny_, Sep 25 2014