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 A303750 #5 May 05 2018 08:22:54 %S A303750 1,4,8,11,14,18,25,28,32,35,39,42,45,49,52,55,59,71,74,78,82,85,89,92, %T A303750 95,99,120,123,127,130,135,138,142,145,148,152,159,162,166,169,173, %U A303750 176,179,183,186,189,193,200,203,207,210,214,217,220,224,227,230,234,246,249,253,264,267,271,274,277,281,288,291,295,298,301 %N A303750 Positions of odd terms in A303751. %H A303750 Antti Karttunen, <a href="/A303750/b303750.txt">Table of n, a(n) for n = 1..44828</a> %Y A303750 Cf. A303751. %K A303750 nonn %O A303750 1,2 %A A303750 _Antti Karttunen_, May 05 2018