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 A038516 #11 Jan 17 2021 11:10:00 %S A038516 0,0,0,25,37,151,199,457,565,1023,1215,1929,2229 %N A038516 Total number of different legs traversed by all loops of length 2n in A038515. %H A038516 Sean A. Irvine, <a href="https://github.com/archmageirvine/joeis/blob/master/src/irvine/oeis/a038/A038516.java">Java program</a> (github) %Y A038516 Cf. A038515. %K A038516 nonn,more %O A038516 0,4 %A A038516 _Wouter Meeussen_ %E A038516 a(8) corrected and a(9)-a(12) from _Sean A. Irvine_, Jan 16 2021