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 A111030 #2 Jun 29 2008 03:00:00 %S A111030 5040,6480,6720,7200,7560,7920,8400,8640,9072,9240,9360,10080,10560, %T A111030 10800,10920,11088,11340,11520,11760,11880,12096,12240,12480,12600, %U A111030 12960,13104,13200,13440,13680,13860 %N A111030 Magic products of 4 X 4 multiplicative magic squares. %H A111030 Christian Boyer, <a href="http://www.multimagie.com/English/Multiplicative.htm">The smallest possible multiplicative magic squares </a>. %e A111030 Here is a 4 X 4 multiplicative magic square: %e A111030 1 15 24 14 %e A111030 12 28 3 5 %e A111030 21 6 10 4 %e A111030 20 2 7 18 %e A111030 The magic product of each row, column or diagonal is 5040. %K A111030 nonn %O A111030 0,1 %A A111030 Christian Boyer (cboyer(AT)club-internet.fr), Oct 05 2005