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 A168315 #3 Mar 30 2012 17:25:35 %S A168315 1,0,1,0,2,1,0,0,2,3,0,0,2,6,5,0,0,0,6,10,13,0,0,0,6,10,26,29,0,0,0,0, %T A168315 10,26,58,71,0,0,0,0,10,26,58,142,165,0,0,0,0,0,26,58,142,330,401,0,0, %U A168315 0,0,0,26,58,142,330,802,957 %N A168315 Triangle read by rows, A168313 * the diagonalized variant of its eigensequence, A168314. %C A168315 Row sums = A168314: (1, 1, 3, 5, 13, 29, 71, 165, 401, 957,...). %C A168315 Rightmost column = A168314 prefaced with a 1. %C A168315 Sum of n-th row terms = rightmost term of next row. %F A168315 Let M = triangle A168313 and Q = in an infinite lower triangular matrix with %F A168315 A168314 prefaced with a 1 as the rightmost diagonal with the rest of terms 0's. %F A168315 Triangle A168315 = M*Q. %e A168315 First few rows of the triangle = %e A168315 1; %e A168315 0, 1; %e A168315 0, 2, 1; %e A168315 0, 0, 2, 3; %e A168315 0, 0, 2, 6, 5; %e A168315 0, 0, 0, 6, 10, 13; %e A168315 0, 0, 0, 6, 10, 26, 29; %e A168315 0, 0, 0, 6, 10, 26, 58, 71; %e A168315 0, 0, 0, 0, 10, 26, 58, 142, 165; %e A168315 0, 0, 0, 0, 0, 26, 58, 142, 330, 401; %e A168315 0, 0, 0, 0, 0, 26, 58, 142, 330, 802, 957; %e A168315 0, 0, 0, 0, 0, 0, 58, 142, 330, 802, 1914, 2315; %e A168315 0, 0, 0, 0, 0, 0, 58, 142, 330, 802, 1914, 4630, 5561; %e A168315 ... %Y A168315 Cf. A168313, A168314 %K A168315 nonn,tabl %O A168315 1,5 %A A168315 _Gary W. Adamson_, Nov 22 2009