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 A345044 #13 May 12 2024 16:00:41
%S A345044 1,1,2,3,4,2,6,7,8,4,10,6,12,6,4,15,16,8,18,12,6,10,22,14,24,12,26,6,
%T A345044 28,4,30,31,10,16,12,24,36,18,12,28,40,6,42,30,8,22,46,30,48,24,16,12,
%U A345044 52,26,20,42,18,28,58,12,60,30,24,63,12,10,66,48,22,12,70,56,72,36,24,18,30,12,78,60,80,40,82,6,16,42
%N A345044 If n = Product p(k)^e(k) then a(n) = LCM (p(k)^e(k) - 1).
%H A345044 Antti Karttunen, <a href="/A345044/b345044.txt">Table of n, a(n) for n = 1..16384</a>
%H A345044 <a href="/index/Lc#lcm">Index entries for sequences related to lcm's</a>
%F A345044 a(n) = A047994(n) / A345045(n).
%o A345044 (PARI) A345044(n) = { my(f=factor(n)~); lcm(vector(#f, i, (f[1, i]^f[2, i])-1)); };
%Y A345044 Cf. A047994, A345045.
%Y A345044 Cf. also A344878, A345046, A353783.
%K A345044 nonn
%O A345044 1,3
%A A345044 _Antti Karttunen_, Jun 07 2021