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 A324552 #11 Jul 15 2023 08:35:03 %S A324552 3,4,11,16,46,82,174,256,798,1300,2734,4354,10926,20518,51790,65536, %T A324552 174766,351118,699054,1110274,3100238,5048230,11184814,17041414, %U A324552 49012990,82623886,211053038,284225794,727960798,1494039790,2863311534,4301668354,12611914846,20788904014,51322664446,73234343950,183355069406,332019460558 %N A324552 a(n) = A324542(2*prime(n)). %C A324552 In contrast to A324549 this seems to be monotonic. %H A324552 Antti Karttunen, <a href="/A324552/b324552.txt">Table of n, a(n) for n = 1..669</a> (based on Hans Havermann's factorization of A156552) %H A324552 <a href="/index/Pri#prime_indices">Index entries for sequences computed from indices in prime factorization</a> %H A324552 <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a> %F A324552 a(n) = A324542(2*A000040(n)). %F A324552 a(n) = sigma(2^n + 1) - 2, for n>1. - _Ridouane Oudra_, Jul 14 2023 %o A324552 (PARI) A324552(n) = A324542(2*prime(n)); %Y A324552 Cf. A000040, A324536, A324542, A324549. %K A324552 nonn %O A324552 1,1 %A A324552 _Antti Karttunen_, Mar 12 2019