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 A339388 #9 Dec 09 2020 10:57:47
%S A339388 0,1,2,3,4,5,4,2,2,4,6,8,10,8,4,3,2,2,4,6,8,10,10,12,10,6,4,2,2,4,6,8,
%T A339388 14,17,20,17,14,10,6,2,2,4,6,10,16,20,26,24,20,14,10,2,2,4,6,11,16,21,
%U A339388 26,27,24,20,14,6,2,2,4,8,16,22,28,34,36,34,20
%N A339388 a(n) is the number of k in the range 1..n-1 such that a(k)*a(n-k) <= a(n-1).
%H A339388 Rémy Sigrist, <a href="/A339388/b339388.txt">Table of n, a(n) for n = 1..10000</a>
%H A339388 Rémy Sigrist, <a href="/A339388/a339388.png">Density plot of the first 1000000 terms</a>
%o A339388 (PARI) { for (n=1, #a=vector(75), print1 (a[n] = sum(k=1, n-1, a[k]*a[n-k]<=a[n-1]) ", ")) }
%Y A339388 Cf. A335060, A339389.
%K A339388 nonn
%O A339388 1,3
%A A339388 _Rémy Sigrist_, Dec 02 2020