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 A169906 #9 Oct 04 2012 10:29:13 %S A169906 2,4,6,8,20,22,24,26,28,40,42,44,46,48,60,62,64,66,68,80,82,84,86,88, %T A169906 204,206,222,224,246,248,266,268,282,284,402,408,422,426,444,448,464, %U A169906 468,482,486,602,608,624,628,642,646,662,666,684,688,804,806,826,828,842,844,862 %N A169906 Carryless products 2*A169887, sorted and duplicates removed. %C A169906 Carryless doubles of the carryless primes. %H A169906 David Applegate, Marc LeBrun and N. J. A. Sloane, <a href="http://neilsloane.com/doc/carry1.pdf">Carryless Arithmetic (I): The Mod 10 Version</a>. %H A169906 <a href="/index/Ca#CARRYLESS">Index entries for sequences related to carryless arithmetic</a> %Y A169906 Cf. A169887, A169907. %K A169906 nonn,base %O A169906 1,1 %A A169906 _David Applegate_, _Marc LeBrun_ and _N. J. A. Sloane_, Jul 11 2010