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 A213689 #13 Jan 09 2021 02:52:43 %S A213689 252416863614,10949070196804,8719491322,3873,5551,6496,9179,15681, %T A213689 20978,26062,28301,35936,50560,55330,66877,88738,94465,111840,128860, %U A213689 177659,179929,230580,261107,275220,300070,361843,395338,457169,446645,505470,560168 %N A213689 Smallest magic sum of an order-n magic square composed of consecutive Smith numbers. %H A213689 Natalia Makarova, <a href="http://www.natalimak1.narod.ru/minsmit.htm">Smallest magic squares composed of consecutive Smith numbers</a> (in Russian) %e A213689 3 X 3 magic square: %e A213689 84138954584 84138954498 84138954532 %e A213689 84138954486 84138954538 84138954590 %e A213689 84138954544 84138954578 84138954492 %e A213689 4 X 4 magic square: %e A213689 2737267549028 2737267549166 2737267549330 2737267549280 %e A213689 2737267549305 2737267549265 2737267549134 2737267549100 %e A213689 2737267549186 2737267549105 2737267549300 2737267549213 %e A213689 2737267549285 2737267549268 2737267549040 2737267549211 %Y A213689 Cf. A006753, A170928, A189121. %K A213689 nonn,base %O A213689 3,1 %A A213689 _Max Alekseyev_, Jun 18 2012