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 A143103 #2 Mar 30 2012 17:25:29 %S A143103 1,5,17,29,54,96,138,202,292,382,503,659,815,1011 %N A143103 Row sums of triangle A143102. %e A143103 a(4) = 29 = sum of row 4 terms of triangle A143102: (3 + 7 + 9 + 10). %e A143103 a(4) = 29 since A143097 = (1, 2, 4, 3, 5,...) with n*A143097(n) = (1, 4, 12, 12, 25, 42,...) and 29 = (1 + 4 + 12 + 12). %Y A143103 Cf. A143097, A143102. %K A143103 nonn %O A143103 1,2 %A A143103 _Gary W. Adamson_, Jul 24 2008