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 A366898 #11 Dec 11 2023 08:37:06
%S A366898 1,2,2,6,4,2,4,4,4,4,6,4,12,10,8,48,8,4,8,4,16,16,8,8,4,8,8,16,24,2,8,
%T A366898 4,8,32,8,32,4,8,4,24,16,8,32,8,16,24,40,16,16,8,8,16,24,8,16,8,16,6,
%U A366898 32,8,8,16,8,512,48,16,12,48,16,8,8,4,24,16,2,256
%N A366898 Number of divisors of n*2^n - 1, the Woodall (or Riesel) numbers.
%H A366898 Amiram Eldar, <a href="/A366898/b366898.txt">Table of n, a(n) for n = 1..865</a>
%F A366898 a(n) = sigma0(n*2^n - 1) = A000005(A003261(n)).
%t A366898 Table[DivisorSigma[0, n*2^n - 1], {n, 1, 100}] (* _Amiram Eldar_, Dec 11 2023 *)
%o A366898 (PARI) a(n) = numdiv(n*2^n - 1); \\ _Amiram Eldar_, Dec 11 2023
%Y A366898 Cf. A000005, A003261, A002234, A242273, A063515, A056821, A367006, A366899.
%K A366898 nonn
%O A366898 1,2
%A A366898 _Tyler Busby_, Oct 26 2023