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 A100866 #6 Mar 30 2012 18:39:53 %S A100866 1,3,5,7,9,15,21,35,71,143,291,635,1407,2979,6101,12339,25019,50413, %T A100866 101339,202793,405745,811365,1624043,3249293,6502711,13011309 %N A100866 Positions of records in the continued fraction expansion A100864. %C A100866 Records form A100865 and are doubly exponential. These terms were independently computed by _Robert G. Wilson v_ and _Hans Havermann_. %o A100866 (PARI) %Y A100866 Cf. A100338, A100863, A100864, A100865. %K A100866 nonn %O A100866 1,2 %A A100866 _Paul D. Hanna_, Nov 21 2004