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 A361120 #9 Mar 03 2023 14:02:38 %S A361120 1,3,5,7,7,3,5,11,11,3,7,11,11,5,5,11,13,13,3,7,13,13,5,17,17,7,3,13, %T A361120 17,17,7,19,19,5,3,11,17,17,5,23,23,19,19,13,13,5,7,29,29,31,31,7,7, %U A361120 37,37,17,17,41,41,5,23,23,7,5,29,29,7,3,43,43,5,11,47 %N A361120 a(n) is the greatest prime factor of A360519(n) with a(1) = 1. %C A361120 See A361119 for the least prime factors. %H A361120 Rémy Sigrist, <a href="/A361120/b361120.txt">Table of n, a(n) for n = 1..10000</a> %H A361120 Rémy Sigrist, <a href="/A361120/a361120.gp.txt">PARI program</a> %F A361120 a(n) = A006530(A360519(n)). %e A361120 A360519(2) = 2*3 so a(2) = 3. %o A361120 (PARI) See Links section. %Y A361120 Cf. A006530, A360519, A361119. %K A361120 nonn,look %O A361120 1,2 %A A361120 _Scott R. Shannon_, _Rémy Sigrist_ and _N. J. A. Sloane_, Mar 03 2023