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 A242044 #36 Oct 02 2014 07:26:11 %S A242044 1,1,3,4,11,33,121,597,4017,35103,428081,6851591,153025577,4535779061, %T A242044 187380634552 %N A242044 Number of isomorphism classes of involutory abelian/medial quandles of order n. %C A242044 Both names "abelian" and "medial" refer to the identity (xy)(uv)=(xu)(yv). A (left) quandle is involutory (aka symmetric, kei) if all (left) translations have order at most 2, i.e., x(xy)=y is satisfied. %C A242044 Enumerates intersection of the classes enumerated in A165200, A178432. %H A242044 P. Jedlička, A. Pilitowska, D. Stanovský, A. Zamojska-Dzienio, <a href="http://arxiv.org/abs/1409.8396">The structure of medial quandles</a>, arXiv:1409.8396 [math.GR], 2014. %H A242044 David Stanovský, <a href="http://www.karlin.mff.cuni.cz/~stanovsk/quandles/">Calculating with quandles</a> GAP code to calculate the numbers. %Y A242044 Cf. A165200, A178432. %K A242044 nonn,hard %O A242044 1,3 %A A242044 _David Stanovsky_, Oct 01 2014