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 A089124 #10 Aug 25 2024 16:18:16
%S A089124 2,7,3,19,7,13,13,67,7,103,31,7,43,199,19,37,73,109,13,31,37,487,19,
%T A089124 193,157,97,61,787,211,43,241,79,13,61,307,433,7,1447,127,229,421,31,
%U A089124 463,277,13,163,79,769,601,2503,31,2707,37,139,757,73,271,37,67,1201,19
%N A089124 Largest prime factor of n^2 + 3.
%D A089124 H. Rademacher, Lectures on Elementary Number Theory, pp. 33-38.
%H A089124 Harvey P. Dale, <a href="/A089124/b089124.txt">Table of n, a(n) for n = 1..1000</a>
%F A089124 a(n) = A006530(A117950(n)). - _Jason Yuen_, Aug 25 2024
%t A089124 FactorInteger[#][[-1,1]]&/@(Range[70]^2+3) (* _Harvey P. Dale_, Jun 17 2020 *)
%o A089124 (PARI) largeasqp3(m) = { for(a=1,m, y=a^2 + 3; f = factor(y); v = component(f,1); v1 = v[length(v)]; print1(v1",")) }
%Y A089124 Cf. A049423, A006530, A117950.
%K A089124 easy,nonn
%O A089124 1,1
%A A089124 _Cino Hilliard_, Dec 05 2003