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 A049208 #7 Jul 22 2021 05:01:03 %S A049208 0,4,16,9,36,16,64,49,64,144,25,25,64,100,196,25,81,81,196,100,49,121, %T A049208 49,256,169,196,49,225,441,225,81,400,49,484,49,169,676,900,121,400, %U A049208 169,361,81,676,1764,361,441,1024,289,441,81,1156,121,529,1156,676,121,289 %N A049208 Perfect square associated with A048699. %Y A049208 Cf. A048699. %K A049208 easy,nonn %O A049208 1,2 %A A049208 _Enoch Haga_ %E A049208 Name updated and a(1)=0 inserted by _Sean A. Irvine_, Jul 21 2021