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 A172624 #19 Apr 09 2024 08:09:28
%S A172624 4,20,32,45,50,68,76,92,117,124,212,236,261,325,333,338,350,412,436,
%T A172624 452,477,578,596,608,620,628,644,650,668,716,722,740,788,801,804,825,
%U A172624 836,855,860,884,892,916,925,932,964,968,981,1014,1017,1058,1076
%N A172624 Numbers k such that 2*A000005(k) = 3*A000005(k+1).
%H A172624 Amiram Eldar, <a href="/A172624/b172624.txt">Table of n, a(n) for n = 1..10000</a>
%F A172624 {k: 2*tau(k) = 3*tau(k+1)}.
%t A172624 Select[Range[1100],2*DivisorSigma[0,#]==3*DivisorSigma[0,#+1]&] (* _Harvey P. Dale_, Nov 06 2012 *)
%o A172624 (PARI) is(n) = 2 * numdiv(n) == 3 * numdiv(n+1); \\ _Amiram Eldar_, Apr 09 2024
%Y A172624 Subsequence of A059269.
%Y A172624 Cf. A000005, A172969.
%K A172624 nonn
%O A172624 1,1
%A A172624 _Juri-Stepan Gerasimov_, Nov 21 2010
%E A172624 Corrected by _D. S. McNeil_, Nov 21 2010