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 A140260 #5 Jul 09 2025 04:29:03 %S A140260 0,4,10,19,33,54,85,132,202,307,465,702,1057,1590,2389,3588,5386,8083, %T A140260 12129,18198,27301,40956,61438,92161,138246,207373,311064,466600, %U A140260 699904,1049860,1574794,2362195,3543297,5314950,7972429,11958648 %N A140260 Those n for which A140259(n) = A002264(n+11). %C A140260 These are the iterations where the knot comes to the front of the necklace in Werneck's Black Pearl Necklace problem. %H A140260 Nicolau Werneck, <a href="http://www.lti.pcs.usp.br/~nwerneck/adaptoide/">Adaptoide</a>, a library for adaptive finite automata. Source code in C++ available. %H A140260 Nicolau Werneck, <a href="http://network.nature.com/blogs/user/nwerneck/2008/01/18/the-black-pearl-necklace">The Black Pearl Necklace</a>, description of the problem. %H A140260 Nicolau Werneck, et al. <a href="http://forum.wolframscience.com/showthread.php?threadid=1506">Discussion on the NKS Forum</a> %Y A140260 Cf. A134342, A140261, A140262. %K A140260 nonn %O A140260 0,2 %A A140260 _Antti Karttunen_, May 16 2008, based on the 2008 postings by Nicolau Leal Werneck (nwerneck(AT)gmail.com)