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 A183045 #7 Jan 09 2024 16:35:21 %S A183045 0,2,3,2,4,1,2,1,4,2,3,2,3,2,3,2,4,3,2,3,2,3,2,3,4,4,3,4,3,4,3,4,3,4, %T A183045 3,4,4,5,4,3,4,3,4,3,4,3,4,5,4,6,5,4,5,4,5,4,5,4,5,4,5,4,5,6,6,5,6,5, %U A183045 4,5,4,5,4,5,4,5,4,5,6,5,6,6,7,6,5,6,5,6,5,6,5,6,5 %N A183045 Triangular array, T(i,j)=number of knight's moves to points on vertical segments (n,-n), (n,-n+1), ... (n,n) on infinite chessboard. %F A183045 See A065775. %e A183045 First five rows: %e A183045 0 %e A183045 2 3 2 %e A183045 4 1 2 1 4 %e A183045 2 3 2 3 2 3 2 %e A183045 4 3 2 3 2 3 2 3 4 %Y A183045 Cf. A065775, A183043. %K A183045 nonn,tabf %O A183045 1,2 %A A183045 _Clark Kimberling_, Dec 20 2010