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 A049299 #16 Jan 02 2020 16:13:27
%S A049299 1,2,9,400,19456921,1101216948902114953248,
%T A049299 76796373204229717290826972582321984854855228022915711475735049
%N A049299 a(n) = Product_{k = 0..n-1} (a(k) + a(n-1-k)), with a(0) = 1.
%H A049299 Andrew Howroyd, <a href="/A049299/b049299.txt">Table of n, a(n) for n = 0..8</a>
%F A049299 lim_{m -> oo} log(a(m+1))/log(a(m)) exists and equals 3. - _Roland Bacher_, Sep 06 2004.
%e A049299 a(3)=400 because 400=(1+9)*(2+2)*(9+1).
%o A049299 (PARI) a(n)={my(v=vector(n+1)); for(n=1, #v, v[n]=prod(k=1, n-1, v[k]+v[n-k])); v[#v]} \\ _Andrew Howroyd_, Jan 02 2020
%Y A049299 Cf. A000108 (Catalan numbers) where a(0) = 1, a(n) = Sum_{k=0..n-1} a(k)*a(n-k), A000012 (constant 1) where a(0) = 1, a(n) = Product_{k=0..n-1} a(k)*a(n-k) and A025192 (2*3^(n-1)) where a(0) = 1, a(n) = Sum_{k=0..n-1} a(k)+a(n-k). - _Henry Bottomley_, May 16 2000
%K A049299 easy,nonn
%O A049299 0,2
%A A049299 _Leroy Quet_
%E A049299 Offset corrected and terms a(6) and beyond from _Andrew Howroyd_, Jan 02 2020