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 A309309 #13 Jul 27 2019 14:49:24
%S A309309 1,12,60,360,2520,27720,75600,138600,831600,10810800,75675600,
%T A309309 183783600,1286485200,24443218800,268875406800,424540116000,
%U A309309 562194032400,733296564000,6184134356400,8066262204000,30920671782000,179339896335600,185524030692000,2411812398996000
%N A309309 Indices of records in A309004.
%C A309309 The corresponding record values are 1, 2, 3, 6, 12, 20, 24, 30, 60, 120, 180, 210, 420, 840, 1120, 1260, 1512, 1680, 2520, 3360, 3780, 5040, 7560, 10080, ...
%H A309309 Amiram Eldar, <a href="/A309309/b309309.txt">Table of n, a(n) for n = 1..105</a>
%H A309309 Amiram Eldar, <a href="/A309309/a309309.txt">Table of n, a(n), A309004(a(n)) for n = 1..105</a>
%t A309309 a[n_] := Multinomial @@ Tally[FactorInteger[n][[;;,2]]][[;;,2]]; s = {}; am = 0; Do[a1 = a[n]; If[a1 > am, am = a1; AppendTo[s, n]], {n, 1, 10^6}]; s
%Y A309309 Cf. A309004.
%Y A309309 Subsequence of A025487.
%K A309309 nonn
%O A309309 1,2
%A A309309 _Amiram Eldar_, Jul 22 2019