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 A131912 #8 Nov 23 2018 21:18:44 %S A131912 1,7,12,18,23,29,34,40,45,51,56,62,67,73,78,84,89,95,100,106,111,117, %T A131912 122,128,133,139,144,150,155,161,166,172,177,183,188,194,199,205,210, %U A131912 216,221,227,232,238,243,249,254,260,265,271,276,282,287,293,298 %N A131912 Row sums of triangle A131911. %F A131912 Binomial transform of (1, 6, -1, 2, -4, 8, -16, ...). %F A131912 a(n) = 11*n - a(n-1) - 14 (with a(1)=1). - _Vincenzo Librandi_, Nov 23 2010 %e A131912 a(4) = 18 = sum of row 4 terms, triangle A131911: (8 + 1 + 2 + 7). %e A131912 a(4) = 18 = (1, 3, 3, 1) dot (1, 6, -1, 2) = (1 + 18 -3, 2). %Y A131912 Cf. A131911. %K A131912 nonn %O A131912 1,2 %A A131912 _Gary W. Adamson_, Jul 27 2007