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 A112820 #13 Mar 15 2021 10:05:44
%S A112820 272,273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,
%T A112820 79507,79508,79509,79510,79511,79512,79513,79514,79515,79516,79517,
%U A112820 79518,79519,79520,79521,79522,79523,79524,79525,79526,79527,79528
%N A112820 Numbers k such that lcm(1,2,3,...,k)/17 equals the denominator of the k-th harmonic number H(k).
%C A112820 When 17 occurs in A110566.
%H A112820 Chai Wah Wu, <a href="/A112820/b112820.txt">Table of n, a(n) for n = 1..10000</a> (n = 1..3106 from Jinyuan Wang)
%t A112820 a = h = 1; t = {}; Do[a = LCM[a, n]; h = h + 1/n; If[a/Denominator[h] == 17, AppendTo[t, n]], {n, 79528}]; t
%Y A112820 Cf. A002805, A003418, A110566.
%Y A112820 Cf. A098464, A112813, A112814, A112815, A112816, A112817, A112818, A112819, A112821, A112822.
%K A112820 nonn
%O A112820 1,1
%A A112820 _Robert G. Wilson v_, Sep 17 2005
%E A112820 Definition corrected by _Jinyuan Wang_, May 03 2020