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 A367010 #13 Oct 28 2024 09:35:37
%S A367010 1,4,13,31,84,192,576,1344,2736,5040,13680,24276,56000,153842,308416,
%T A367010 538920,1110276,2909040,5495040,14446080,31374720,45955008,106119552,
%U A367010 233997312,527587200,1184932800,3247522560,4365239040,7784309910,16265125632,36250560000
%N A367010 a(n) is the sum of the divisors of n*2^n + 1.
%C A367010 The numbers n*2^n+1 are called Cullen numbers.
%H A367010 Amiram Eldar, <a href="/A367010/b367010.txt">Table of n, a(n) for n = 0..865</a>
%F A367010 a(n) = sigma(n*2^n + 1) = A000203(A002064(n)).
%t A367010 DivisorSigma[1, Table[n*2^n+1, {n,0,30}]] (* _Paul F. Marrero Romero_, Dec 17 2023 *)
%Y A367010 Cf. A002064, A000203, A063515, A367007, A367009.
%K A367010 nonn
%O A367010 0,2
%A A367010 _Sean A. Irvine_, Oct 31 2023