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 A059718 #7 Sep 01 2025 11:27:12 %S A059718 1,1,1,1,2,2,1,3,5,5,1,4,9,16,15,1,5,14,35,59,55,1,6,20,64,152,258, %T A059718 239,1,7,27,105,319,767,1296,1199,1,8,35,160,590,1820,4356,7362,6810, %U A059718 1,9,44,231,1000,3751,11514,27583,46609,43108,1,10,54,320,1589 %N A059718 Triangle T(n,k), 0<=k<=n, giving coefficients when output sequence O_0, O_1, O_2, ... from transformation described in A059216 is expressed in terms of input sequence I_0, I_1, I_2, ... %e A059718 The triangle begins as: %e A059718 1; %e A059718 1, 1; %e A059718 1, 2, 2; %e A059718 1, 3, 5, 5; %e A059718 1, 4, 9, 16, 15; %e A059718 ... %e A059718 For example, O_4 = I_4 + 4*I_3 + 9*I_2 + 16*I_1 + 15*I_0. %Y A059718 Cf. A059720, A059216. %K A059718 nonn,tabl,changed %O A059718 0,5 %A A059718 _N. J. A. Sloane_, Feb 08 2001