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 A353616 #5 Apr 30 2022 10:35:35
%S A353616 3,3,9,2,21,29,41,59,73,107,139,157,4941,7707,157,1929,1973,7643,
%T A353616 147749,313733,1774479,1015973,1615943,6646647,3280781,5670497,
%U A353616 31673271,21228137
%N A353616 a(n) is the denominator of the median abundancy index of the first 2^n + 1 positive integers.
%C A353616 See A353615 for more details.
%t A353616 With[{m = 20}, t = Table[DivisorSigma[-1, n], {n, 1, 2^m + 1}]; Denominator @ Table[Median[t[[1 ;; 2^n + 1]]], {n, 1, m}]]
%Y A353616 Cf. A000203, A017665, A017666, A353615 (numerators), A353617.
%K A353616 nonn,frac,more
%O A353616 1,1
%A A353616 _Amiram Eldar_, Apr 30 2022