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 A183046 #9 May 04 2014 16:55:29 %S A183046 0,7,12,17,26,39,50,71,84,109,128,157,178,215,238,279,308,353,384,437, %T A183046 470,527,566,627,668,737,780,853,902,979,1030,1115,1168,1257,1316, %U A183046 1409,1470,1571,1634,1739,1808,1917,1988,2105 %N A183046 Sums of knight's moves from (0,0) to vertical segments (n,-n) to (n,n) on infinite chessboard. %F A183046 T(n,-n)+T(n,-n+1)+...+T(n,n), where T is given at A065775. %F A183046 Empirical g.f.: x*(4*x^8+2*x^7-8*x^6-7*x^5+5*x^3-3*x^2-12*x-7) / ((x-1)^3*(x+1)^2*(x^2+x+1)). - _Colin Barker_, May 04 2014 %Y A183046 Cf.A065775, A183045. %K A183046 nonn %O A183046 0,2 %A A183046 _Clark Kimberling_, Dec 20 2010