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 A143313 #2 Mar 30 2012 17:25:31 %S A143313 1,4,1,5,1,1,11,4,1,1,7,1,1,1,1,20,8,4,1,1,19,1,1,1,1,1,1,26,11,4,4,1, %T A143313 1,1,1,18,5,5,1,1,1,1,1,1,28,10,4,4,4,1,1,1,1,1,13,1,1,1,1,1,1,1,1,1, %U A143313 1,55,27,15,8,4,4,1,1,1,1,1,1,15,1,1,1,1,1,1,1,1,1,1,1,1 %N A143313 Triangle read by rows, A130540 * A000012, 1<=k<=n. %C A143313 Left border = A007429: (1, 4, 5, 11, 7, 20, 9,...). %C A143313 Row sums = A060640: (1, 5, 7, 17, 11, 35,...). %F A143313 Triangle read by rows, A130540 * A000012, 1<=k<=n. Equals partial row sums of A130540 starting from the right. %e A143313 First few rows of the triangle = %e A143313 1; %e A143313 4, 1; %e A143313 5, 1, 1; %e A143313 11, 4, 1, 1; %e A143313 7, 1, 1, 1, 1; %e A143313 20, 8, 4, 1, 1, 1; %e A143313 9, 1, 1, 1, 1, 1, 1; %e A143313 ... %e A143313 Row 4 = (11, 4, 1, 1) since row 4 of A130540 = (7, 3, 0, 1). %Y A143313 Cf. A130540, A007429, A060640. %K A143313 nonn,tabl %O A143313 1,2 %A A143313 _Gary W. Adamson_, Aug 06 2008