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 A265142 #36 Apr 03 2016 10:06:04
%S A265142 711,3249,412249,521298,756786,1076461
%N A265142 a(n) = smallest magic sum of any 3 X 3 semimagic square composed of n-gonal numbers.
%H A265142 <a href="/index/Mag#magic">Index entries for sequences related to magic squares</a>
%F A265142 a(n) = Sum_{k=1..3} A265141(n,k).
%Y A265142 Cf. A269060, A269061, A265141.
%K A265142 nonn,more
%O A265142 3,1
%A A265142 _Arkadiusz Wesolowski_, Dec 02 2015
%E A265142 a(6)-a(8) from _Arkadiusz Wesolowski_, Apr 03 2016