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 A371209 #10 Jun 29 2025 02:24:52
%S A371209 1,0,1,1,1,1,1,1,2,1,1,3,1,1,3,2,1,3,1,3,3,1,1,5,2,1,4,3,1,5,1,3,3,1,
%T A371209 3,9,1,1,3,5,1,5,1,3,8,1,1,10,2,3,3,3,1,8,3,5,3,1,1,15,1,1,8,5,3,5,1,
%U A371209 3,3,5,1,18,1,1,8,3,3,5,1,10,8,1,1,15,3,1,3
%N A371209 Number of ordered factorizations of n into factors > 2.
%H A371209 Amiram Eldar, <a href="/A371209/b371209.txt">Table of n, a(n) for n = 1..10000</a>
%F A371209 a(1) = 1; a(n) = Sum_{d|n, n/d > 2} a(d).
%e A371209 a(12) = 3: 12 = 3*4 = 4*3.
%t A371209 a[n_] := a[n] = If[n == 1, n, Sum[If[n/d > 2, a[d], 0], {d, Divisors[n]}]]; Table[a[n], {n, 1, 87}]
%Y A371209 Cf. A002033, A008483, A074206, A078012, A371211, A371212, A371213.
%K A371209 nonn
%O A371209 1,9
%A A371209 _Ilya Gutkovskiy_, Mar 15 2024