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 A269231 #12 Apr 15 2016 08:16:13 %S A269231 19,16,15,32,73,153,1520,5104,241801435 %N A269231 a(n) = smallest magic sum of any 3 X 3 semimagic square which contains exactly n cubes. %H A269231 Multimagic Squares, <a href="http://www.multimagie.com/English/SquaresOfCubes.htm">Magic squares of cubes</a> %H A269231 The Prime Puzzles and Problems Connection, <a href="http://www.primepuzzles.net/puzzles/puzz_412.htm">Puzzle 412</a> %H A269231 Arkadiusz Wesolowski, <a href="/A269231/a269231.txt">Examples of these semimagic squares</a> %H A269231 <a href="/index/Mag#magic">Index entries for sequences related to magic squares</a> %Y A269231 Cf. A268854, A268855, A268856. %K A269231 nonn,fini,hard,more %O A269231 0,1 %A A269231 _Arkadiusz Wesolowski_, Feb 20 2016 %E A269231 a(8) from Christian Boyer, added by _Arkadiusz Wesolowski_, Apr 14 2016