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 A009404 #2 May 16 2003 03:00:00 %S A009404 49,144,169,361,441,1225,1369,1444,1681,1936,3249,4225,9025,9409, %T A009404 10404,11025,11449,11664,12544,14161,14641,15625,16641,19044,36481, %U A009404 40401,41616,42025,43681,44944,49729,64009,81225,93025,93636,99225,105625,116964 %N A009404 Squares formed by concatenating other squares, not ending in 0. %Y A009404 Cf. A019547. %K A009404 nonn,base %O A009404 1,1 %A A009404 R. Muller