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 A159699 #5 Mar 31 2017 20:43:28 %S A159699 0,2,5,7,12,14,17,19,28,30,33,35,40,42,45,47,64,66,69,71,76,78,81,83, %T A159699 92,94,97,99,104,106,109,111,144,146,149,151,156,158,161,163,172,174, %U A159699 177,179,184,186,189,191,208,210,213,215,220,222,225,227,236,238,241,243 %N A159699 Replace 2^k in binary expansion of n with A045623(k+1). %C A159699 Index of zeros in A159689. %F A159699 A159689(a(n)) = 0. %K A159699 easy,nonn %O A159699 0,2 %A A159699 _Philippe Deléham_, Apr 20 2009