|
%I #13 Jul 15 2023 15:01:08
%S 3,2,5,2,16,20,48,2,288,278,688,260,2736,4136,19024,2,43696,88976,
%T 174768,61700,1003088,853928,2796208,264200,15458560,15515024,
%U 76835312,15790340,191089888,420297968,715827888,6701060,4021980256,3609034832,16962926080,4514867216,45916115936,57141553616,244626722384,4278255620
%N a(n) = A324543(2*A000040(n)).
%C Term 2 occurs (at least) at n = 2, 4, 8 and 16. See A019434.
%H Antti Karttunen, <a href="/A324549/b324549.txt">Table of n, a(n) for n = 1..331</a>
%F a(n) = A324543(2*A000040(n)).
%F a(n) = sigma(2^n + 1) - 2^n, for n>1. - _Ridouane Oudra_, Jul 15 2023
%o (PARI) A324549(n) = A324543(2*prime(n));
%Y Cf. A000040, A000051, A000079, A000203, A019434, A324543.
%K nonn
%O 1,1
%A _Antti Karttunen_, Mar 07 2019
|
