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 A037290 #15 Dec 05 2014 04:27:38 %S A037290 1,2,2,9,2,4,2,40,9,4,2,18,2,4,4,242,2,18,2,18,4,4,2,80,9,4,47,18,2,8, %T A037290 2 %N A037290 Number of self-converse rings (isomorphic to inverse) with n elements. %H A037290 A. V. Lelechenko, <a href="http://arxiv.org/abs/1305.1639">Parity of the number of primes in a given interval and algorithms of the sublinear summation</a>, arXiv:1305.1639 [math.NT], 2013. %H A037290 Christof Noebauer, <a href="https://web.archive.org/web/20070613192932/http://www.algebra.uni-linz.ac.at/~noebsi/">Home page</a> %Y A037290 Cf. A027623, A037289. %K A037290 nonn,hard,mult,nice %O A037290 1,2 %A A037290 _Christian G. Bower_, Jun 15 1998 %E A037290 a(16) and a(27) from Christof Noebauer (christof.noebauer(AT)algebra.uni-linz.ac.at), Oct 17 2000