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 A244018 #3 Jun 19 2014 13:30:03 %S A244018 3,9,12,27,37,40,49,54,58,70,85,88,106,109,119,122,125,128,132,141, %T A244018 154,160,164,166,171,173,176,186,193,211,213,227,238,243,245,265,277, %U A244018 280,283,296,301,304,318,324,326,333,343,346 %N A244018 Numbers missing from A244017. %Y A244018 Cf. A243700, A243864, A244010, A244011, A244016, A244017. %K A244018 nonn %O A244018 1,1 %A A244018 _Max Alekseyev_ and _N. J. A. Sloane_, Jun 19 2014