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 A063515 #19 Nov 29 2019 04:03:21
%S A063515 1,8,24,104,216,384,1080,2160,4896,13656,32552,51312,137160,287408,
%T A063515 573600,1999872,3034368,4778400,11098080,20984560,49533120,137218560,
%U A063515 294000768,417361152,958698064,1755253280,4362821232,10552800000
%N A063515 Sum of divisors of Woodall (or Riesel) numbers; sigma(A003261(n)); sigma(n*2^n - 1).
%H A063515 Amiram Eldar, <a href="/A063515/b063515.txt">Table of n, a(n) for n = 1..853</a> (terms 1..200 from Harry J. Smith)
%F A063515 a(n) = sigma(n*2^n-1).
%o A063515 (PARI) j=[]; for(n=1,50,x=sigma(n*2^n-1); j=concat(j,x)); j
%o A063515 (PARI) { for (n=1, 200, write("b063515.txt", n, " ", sigma(n*2^n - 1)) ) } \\ _Harry J. Smith_, Aug 24 2009
%Y A063515 Cf. A000203, A003261.
%K A063515 easy,nonn
%O A063515 1,2
%A A063515 _Jason Earls_, Jul 31 2001