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 A144599 #8 May 28 2025 15:37:46 %S A144599 0,0,1,0,1,0,1,0,1,0,1,0,1,0,0,1,0,1,0,1,0,1,0,1,0,1,0,0,1,0,1,0,1,0, %T A144599 1,0,1,0,1,0,0,1,0,1,0,1,0,1,0,1,0,1,0,0,1,0,1,0,1,0,1,0,1,0,1,0,0,1, %U A144599 0,1,0,1,0,1,0,1,0,1,0,0,1,0,1,0,1,0,1,0,1,0,1,0,0,1,0,1,0,1,0,1,0,1,0,1,0 %N A144599 Christoffel word of slope 6/7. %C A144599 The path is on the slope after 0, 13, 26 ,39 ,52, .... steps which gives the C-finite recurrence. - _R. J. Mathar_, May 28 2025 %F A144599 a(n) = a(n-13). - _R. J. Mathar_, May 28 2025 %F A144599 G.f.: -x^2*(1+x^2)*(x^4-x^2+1)*(x^2-x+1)*(1+x+x^2) / ( (x-1)*(1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12) ). - _R. J. Mathar_, May 28 2025 %Y A144599 See A144595 for further details. %K A144599 nonn,easy %O A144599 0,1 %A A144599 _N. J. A. Sloane_, Jan 13 2009