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 A280638 #13 Nov 23 2019 04:05:30
%S A280638 1,1,1,2,4,2,4,2,12,16,6,8,8,2,4,8,4,10,8,12,12,16,64,8,8,64,16,64,16,
%T A280638 16,64,4,8,4,16,48,16,8,8,8,8,16,2,128,16,32,16,64,16,4,16,8,24,16,8,
%U A280638 2,576,8,8,16,8,128,4,128,16,8,64,8,8,16,16
%N A280638 Number of odd divisors of Bell(n).
%H A280638 Amiram Eldar, <a href="/A280638/b280638.txt">Table of n, a(n) for n = 0..104</a>
%F A280638 a(n) = A001227(A000110(n)).
%t A280638 Table[B=BellB[n]; r=IntegerExponent[B, 2]; DivisorSigma[0, B/2^r], {n, 0, 60}]
%Y A280638 Cf. A000110, A001227, A280589.
%K A280638 nonn
%O A280638 0,4
%A A280638 _Vincenzo Librandi_, Jan 07 2017
%E A280638 Offset corrected by _Amiram Eldar_, Nov 23 2019