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 A269975 #7 Mar 21 2016 09:58:17 %S A269975 2,1,2,1,1,1,1,2,2,1,2,2,1,3,2,1,1,2,3,1,2,1,2,2,1,1,1,1,1,1,2,1,2,1, %T A269975 1,1,2,3,1,1,1,4,2,2,1,1,1,2,1,2,3,1,3,3,1,2,1,2,1,1,3,2,2,2,1,1,1,1, %U A269975 2,1,3,2,1,1,1,1,1,1,5,2,2,1,1,1,2,1 %N A269975 Factorial-nested interval sequence of -1 + sqrt(2). %C A269975 See A269970 for a definition of factorial-nested interval sequence and guide to related sequences. %F A269975 Empirical: a(n) = A269974(n+1). - _R. J. Mathar_, Mar 21 2016 %Y A269975 Cf. A000142, A269970. %K A269975 nonn,easy %O A269975 1,1 %A A269975 _Clark Kimberling_, Mar 08 2016