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 A144605 #4 May 30 2025 13:36:17 %S A144605 0,0,1,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,0,1,0,0,1,0,1,0,0,1,0,1,0,0,1, %T A144605 0,1,0,0,1,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,0,1,0,0,1,0,1,0,0,1,0,1,0, %U A144605 0,1,0,1,0,0,1,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,0,1,0,0,1,0,1,0,0,1,0,1,0,0 %N A144605 Christoffel word of slope 7/11. %F A144605 a(n) = a(n-18). - _R. J. Mathar_, May 30 2025 %F A144605 G.f.: -x^2*(1+x^3+x^5+x^8+x^10+x^13+x^15) / ( (x-1)*(1+x+x^2)*(1+x^3+x^6)*(1+x)*(1-x+x^2)*(1-x^3+x^6) ). - _R. J. Mathar_, May 30 2025 %Y A144605 See A144595 for further details. %K A144605 nonn,easy %O A144605 0,1 %A A144605 _N. J. A. Sloane_, Jan 13 2009