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 A096853 #15 Jun 04 2024 01:26:08
%S A096853 1,2,4,8,16,48,64,144,288,512,576,2304,4096,10240,18432,36288,65536,
%T A096853 184320,262144,552960,718848,1492992,2822400,9123840,13418496,
%U A096853 44695552,68762880,106168320,109486080,580386816,1073741824,2155507200,2366668800,6920601600,12081954816
%N A096853 a(n) = A062401(2^n-1).
%H A096853 Amiram Eldar, <a href="/A096853/b096853.txt">Table of n, a(n) for n = 1..392</a>
%F A096853 a(n) = A000010(A000203(A000225(n))). - _Michel Marcus_, Dec 19 2013
%F A096853 a(n) = A000010(A075708(n)). - _Amiram Eldar_, Jun 04 2024
%t A096853 Table[ EulerPhi[ DivisorSigma[1, 2^n - 1]], {n, 33}]
%Y A096853 Cf. A000010, A000203, A000225, A062401, A062402, A053287, A075708, A096853, A096854, A096855, A096856.
%K A096853 nonn
%O A096853 1,2
%A A096853 _Labos Elemer_, Jul 19 2004
%E A096853 Edited and extended by _Robert G. Wilson v_, Jul 23 2004
%E A096853 a(33)-a(35) from _Amiram Eldar_, Jun 04 2024