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 A110598 #15 Dec 04 2019 11:47:26
%S A110598 137885,145145,3501605,6605945,6953765,8409305,10055045,11413205,
%T A110598 11569805,16540205,18545285,19648805,21902705,22806905,25965005,
%U A110598 26655005,29811665,45680921,71569745,79989845,91681289,196492205,214218389,223086125,229554941,233601641
%N A110598 Balanced numbers k such that k mod 12 = 5.
%C A110598 For the first 26 terms, the quotient sigma(k)/phi(k) is 2 or 3.
%H A110598 Amiram Eldar, <a href="/A110598/b110598.txt">Table of n, a(n) for n = 1..7013</a> (terms below 6.5*10^14, calculated using data from Jud McCranie)
%p A110598 with(numtheory); BNM5:=[]: for z from 1 to 1 do for m from 1 to 1000000 do n:=12*m+5; if sigma(n) mod phi(n) = 0 then BNM5:=[op(BNM5),n] fi; od; od; BNM5;
%t A110598 Select[Range[5,12000000,12],MemberQ[{2,3},DivisorSigma[1,#]/EulerPhi[#]]&] (* _Harvey P. Dale_, May 06 2012 *)
%Y A110598 Intersection of A017581 and A020492.
%Y A110598 Cf. A000010, A000203, A062699, A068391.
%K A110598 nonn
%O A110598 1,1
%A A110598 _Walter Kehowski_, Sep 13 2005
%E A110598 a(10)-a(26) from _Donovan Johnson_, Aug 30 2012