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 A168318 #3 Mar 30 2012 17:25:35 %S A168318 1,0,1,0,2,1,0,1,2,3,0,1,3,6,6,0,0,2,9,12,16,0,0,2,12,18,32,39,0,0,1, %T A168318 9,24,48,78,103,0,0,1,9,30,64,117,206,263,0,0,0,6,24,80,156,309,526, %U A168318 690,0,0,0,6,24,96,195,412,789,1380,1791 %N A168318 Triangle read by rows, A168316 * its diagonalized eigensequence, A168317. %C A168318 Row sums = A168317: (1, 1, 3, 6, 16, 39, 103, 263,...). %C A168318 Rightmost diagonal = A168317 prefaced with a 1. %C A168318 Sum of n-th row terms = rightmost term of next row. %F A168318 Triangle read by rows, M*Q. M = A168316, Q = an infinite lower triangular matrix %F A168318 with A168317 prefaced with a 1; (1, 1, 1, 3, 6, 16, 39, 103,...) as the right %F A168318 diagonal and the rest zeros. %e A168318 First few rows of the triangle = %e A168318 1; %e A168318 0, 1; %e A168318 0, 2, 1; %e A168318 0, 1, 2, 3; %e A168318 0, 1, 3, 6, 6; %e A168318 0, 0, 2, 9, 12, 16; %e A168318 0, 0, 2, 12, 18, 32, 39; %e A168318 0, 0, 1, 9, 24, 48, 78, 103; %e A168318 0, 0, 1, 9, 30, 64, 117, 206, 263; %e A168318 0, 0, 0, 6, 24, 80, 156, 309, 526, 690; %e A168318 0, 0, 0, 6, 24, 96, 195, 412, 789, 1380, 1791; %e A168318 0, 0, 0, 3, 18, 80, 234, 515, 1052, 2070, 3582, 4693; %e A168318 0, 0, 0, 3, 18, 80, 273, 618, 1315, 2760, 5373, 9386, 12247; %e A168318 0, 0, 0, 0, 12, 64, 234, 721, 1578, 3450, 7164, 14079, 24494, 32073; %e A168318 ... %Y A168318 Cf. A168316, A168317 %K A168318 nonn,tabl %O A168318 1,5 %A A168318 _Gary W. Adamson_, Nov 22 2009