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 A144602 #6 May 28 2025 15:41:43 %S A144602 0,0,0,1,0,0,0,1,0,0,0,1,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,1,0,0,0,1, %T A144602 0,0,0,1,0,0,0,1,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,1,0,0,0,1,0,0,0,1, %U A144602 0,0,0,1,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,1 %N A144602 Christoffel word of slope 4/11. %C A144602 The path is on the slope after 0, 15, 30, 45, 60, 75,... (A008597) steps, which gives a simple C-finite recurrence. - _R. J. Mathar_, May 28 2025 %F A144602 a(n) = a(n-15). - _R. J. Mathar_, May 28 2025 %F A144602 G.f.: -x^3*(1+x^4+x^8+x^11) / ( (x-1)*(1+x^4+x^3+x^2+x)*(1+x+x^2)*(1-x+x^3-x^4+x^5-x^7+x^8) ). - _R. J. Mathar_, May 28 2025 %Y A144602 See A144595 for further details. %K A144602 nonn,easy %O A144602 0,1 %A A144602 _N. J. A. Sloane_, Jan 13 2009