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 A321204 #7 Nov 09 2018 21:53:35
%S A321204 1,1,0,-2,-2,4,11,-3,-46,-38,152,334,-301,-1855,-719,7869,12450,
%T A321204 -23422,-87520,12924,447028,458664,-1699630,-4308816,3528771,26104199,
%U A321204 12852166,-118868366,-207528889,368534179,1517678456,-109794866,-8068372174,-9080718086,31552958156,85735418464,-63813069724,-530936155928,-300127192606
%N A321204 Row sums of Riordan triangle A319203.
%C A321204 The alternating row sums are given in A321205.
%F A321204 G.f: f(x)/(1 - x*f(x)) where f(x) = F^([-1])(x)/x with F^{[-1]}(y) the compositional inverse of F(x) = x/(1 - x^2 - x^3). The expansion of f is given in A319201.
%Y A321204 Cf. A319201, A319203, A321205.
%K A321204 sign,easy
%O A321204 0,4
%A A321204 _Wolfdieter Lang_, Nov 09 2018