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 A252784 #14 May 15 2016 03:52:02 %S A252784 0,0,1,3,7,22,89,779,30078,8785772,48803495722,1774274116992170 %N A252784 Number of exponent-2 class 2 groups of order 2^n. %H A252784 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>, The Mathematical Intelligencer, March 2008, Volume 30, Issue 2, pp 6-15. %H A252784 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 A252784 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 A252784 Cf. A000679, A252785, A252786, A252787. %K A252784 nonn,hard,more %O A252784 0,4 %A A252784 _Eric M. Schmidt_, Dec 21 2014