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 A144608 #6 May 28 2025 15:43:40 %S A144608 0,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,0,1,0,1,0,1,0,1,0,1,0,1, %T A144608 0,1,0,1,0,1,0,1,0,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,0,1,0,1, %U A144608 0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 %N A144608 Christoffel word of slope 10/11. %C A144608 The path is on the slope after 0, 21, 42, 63, 84,... steps (A008603), which gives the simple C-finite recurrence. - _R. J. Mathar_, May 28 2025 %F A144608 a(n) = a(n-21). - _R. J. Mathar_, May 28 2025 %F A144608 G.f.: -x^2*(1+x^2)*(x^8-x^6+x^4-x^2+1)*(x^4-x^3+x^2-x+1)*(1+x+x^2+x^3+x^4) / ( (x-1)*(1+x^6+x^5+x^4+x^3+x^2+x)*(1+x+x^2)*(1-x+x^3-x^4+x^6-x^8+x^9-x^11+x^12) ). - _R. J. Mathar_, May 28 2025 %Y A144608 See A144595 for further details. %K A144608 nonn,easy %O A144608 0,1 %A A144608 _N. J. A. Sloane_, Jan 13 2009