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 A271712 #10 Apr 14 2016 10:06:07
%S A271712 1402,2823,2591234,4347245,95803378,4818162,160959761,156127479
%N A271712 a(n) = smallest magic sum of any 4 X 4 magic square composed of n-gonal numbers.
%H A271712 Christian Boyer, <a href="http://www.multimagie.com/English/SmallestTriangular.htm">Smallest magic squares of triangular numbers</a>
%H A271712 <a href="/index/Mag#magic">Index entries for sequences related to magic squares</a>
%F A271712 a(n) = Sum_{k=1..4} A271711(n,k).
%Y A271712 Cf. A271579, A271580, A271711.
%K A271712 nonn,more
%O A271712 3,1
%A A271712 _Arkadiusz Wesolowski_, Apr 12 2016
%E A271712 a(6)-a(10) were found in 2013 and 2014 by Lee Morgenstern