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 A379206 #6 Dec 20 2024 23:39:12
%S A379206 1,4,52,1004,24540,693528,21365548,694033712,23369007288,808414759404,
%T A379206 28582681491280,1029170281603296,37633688114705676,
%U A379206 1394397634883242504,52252719103306019248,1977346544751795430944,75468918458797503960180,2902157847756806886385760,112350085062188369503742656
%N A379206 Central terms of triangle A379200; a(n) = A379200(2*n-1,n-1) for n >= 1.
%C A379206 G.f. G(x,y) of triangle A379200 satisfies 1/x = Sum_{n=-oo..+oo} G(x,y)^n * (G(x,y)^n + y)^(n+1). This sequence gives the coefficients of x^(2*n-1)*y^(n-1) in G(x,y) for n >= 1.
%H A379206 Paul D. Hanna, <a href="/A379206/b379206.txt">Table of n, a(n) for n = 1..51</a>
%Y A379206 Cf. A379200.
%K A379206 nonn
%O A379206 1,2
%A A379206 _Paul D. Hanna_, Dec 20 2024