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 A320730 #6 Oct 20 2018 10:21:35 %S A320730 2,5,6,8,10,11,13,14,17,18,20,21,22,23,24,26,27,29,30,32,34,35,37,38, %T A320730 40,41,42,43,44,45,46,47,49,50,52,53,54,55,56,58,59,61,62,65,66,68,69, %U A320730 70,71,72,74,75,77,78,80,81,82,83,84,85,86,87,88,89,90,91,92,93 %N A320730 Integers k such that A086747(k) = 0, where A086747 is the Baum-Sweet sequence. %H A320730 Lukasz Merta, <a href="https://arxiv.org/abs/1803.00292">Composition inverses of the variations of the Baum-Sweet sequence</a>, arXiv:1803.00292 [math.NT], 2018. See h(n) p. 23. %o A320730 (PARI) bs(n)=if(n<3, n<2, if(n%2, bs(n\2), n%4==0&&bs(n/4))); \\ A086747 %o A320730 isok(n) = bs(n) == 0; %Y A320730 Complement of A060142. Cf. A086747. %K A320730 nonn %O A320730 1,1 %A A320730 _Michel Marcus_, Oct 20 2018