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 A057987 #6 May 20 2017 21:53:22 %S A057987 2,3,5,8,12,13,17,19,20,22,26,28,29,32,33,35,38,42,44,45,48,49,51,55, %T A057987 56,58,61,65,66,70,72,73,76,77,79,83,84,86,89,93,95,96,98,101,105,106, %U A057987 110,112,113,115,119,121,122,125,126,128,132,133 %N A057987 Positions of 1 in A057985. %H A057987 Clark Kimberling, <a href="/A057987/b057987.txt">Table of n, a(n) for n = 1..10000</a> %Y A057987 Cf. A057985, A057986, A057988. %K A057987 nonn %O A057987 1,1 %A A057987 _Clark Kimberling_, Oct 30 2000