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 A144604 #6 May 28 2025 15:42:45 %S A144604 0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,1, %T A144604 0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,1, %U A144604 0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,1,0,0,1 %N A144604 Christoffel word of slope 6/11. %C A144604 The path is on the slope after 0, 17, 34, 51, 68, 85,... steps (see A008599), which gives the C-finite recurrence. - _R. J. Mathar_, May 28 2025 %F A144604 a(n) = a(n-17). - _R. J. Mathar_, May 28 2025 %F A144604 G.f.: -x^2*(x^2+1)*(x^12+x^7-x^5+x^4+x^3-x^2+1)/ (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 +x^13 +x^14 +x^15 +x^16) . - _R. J. Mathar_, May 28 2025 %Y A144604 See A144595 for further details. %K A144604 nonn,easy %O A144604 0,1 %A A144604 _N. J. A. Sloane_, Jan 13 2009