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 A259241 #14 Jul 15 2015 21:24:32 %S A259241 4,8,9,12,16,18,20,24,25,27,28,30,32,36,40,42,44,45,48,49,50,52,54,55, %T A259241 56,60,63,64,66,68,70,72,75,76,78,80,81,84,85,88,90,91,92,96,98,99, %U A259241 100,102,104,105,108,110,112,114,115,116,117,119,120,121,124,125 %N A259241 Areas of rectangles that can be completely filled with squares of side length > 1 (with all side lengths restricted to the natural numbers). %C A259241 Contains all integers from A013929. %C A259241 Subset of A078137. %H A259241 Giovanni Resta, <a href="/A259241/b259241.txt">Table of n, a(n) for n = 1..250</a> %H A259241 Giovanni Resta, <a href="/A259241/a259241.png">Illustration of the first 48 squarefree terms</a> %e A259241 See illustration in Links. %Y A259241 Cf. A078137. %K A259241 nonn %O A259241 1,1 %A A259241 _Laurance L. Y. Lau_, Jun 22 2015 %E A259241 a(14)-a(62) from _Giovanni Resta_, Jun 22 2015