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 A252786 #7 Dec 23 2014 15:36:09 %S A252786 0,0,1,3,7,26,117,6851,85249444,39565495603665,40261075301026166295207 %N A252786 Number of exponent-5 class 2 groups of order 5^n. %H A252786 J. H. Conway, Heiko Dietrich and E. A. O'Brien, <a href="http://www.math.auckland.ac.nz/~obrien/research/gnu.pdf">Counting groups: gnus, moas and other exotica</a>. %H A252786 Bettina Eick and E. A. O'Brien, <a href="http://www.math.auckland.ac.nz/~obrien/research/count-pgroups.pdf">Enumerating p-groups</a>. Group theory. J. Austral. Math. Soc. Ser. A 67 (1999), no. 2, 191-205. %H A252786 E. A. O'Brien, <a href="https://www.math.auckland.ac.nz/~obrien/research/bibliography.pdf">Bibliography on the determination of finite groups</a>. %Y A252786 Cf. A090130, A252784, A252785, A252787. %K A252786 nonn,hard,more %O A252786 0,4 %A A252786 _Eric M. Schmidt_, Dec 21 2014