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 A156943 #19 Oct 10 2023 09:30:39
%S A156943 81162081,138791961,173369889,441882441,730458729,1091179089,
%T A156943 1249127649,1524043521,1560329001,1744649361,2286465489,2606204601,
%U A156943 3255501249,3976941969,4770526761,5567099769,6574128561,6800806089,7584145569
%N A156943 Odd abundant numbers not divisible by 25 whose abundancy is odd.
%C A156943 Number of terms < 10^n: 0, 0, 0, 0, 0, 0, 0, 1, 5, 25, 63, ..., .
%H A156943 Robert G. Wilson v, <a href="/A156943/b156943.txt">Table of n, a(n) for n=1..1005</a>
%t A156943 q[n_] := Module[{ab = DivisorSigma[1, n] - 2*n}, ab > 0 && OddQ[ab]]; Select[Range[1, 7775536039, 2], ! Divisible[#, 25] && q[#] &] (* corrected by _Amiram Eldar_, Oct 10 2023 *)
%Y A156943 Subsequence of A156903 and A156942.
%K A156943 nonn
%O A156943 1,1
%A A156943 _Robert G. Wilson v_, Feb 18 2009
%E A156943 Name corrected by _Amiram Eldar_, Oct 10 2023