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 A085145 #3 Mar 30 2012 18:41:20 %S A085145 0,1,3,7,10,15,21,26,31,36,43,46,53,58,63,73,82,87,93,100,107,110,117, %T A085145 122,127,136,147,150,156,165,170,175,180,187,190,201,210,215,221,228, %U A085145 235,238,245,250,255,273,290,295,301,313,324,331,334,341 %N A085145 Positions of 0 in A085144. %C A085145 If n is odd then (n-1)/2 is also in sequence, with the even subsequence starting 0,10,26,36,46,58... %C A085145 Records for first differences are 2,3,...,2^k+2,2^k+3... %K A085145 nonn,easy %O A085145 1,3 %A A085145 _Ralf Stephan_, Jun 20 2003