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 A290105 #8 Aug 15 2017 20:34:02
%S A290105 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,
%T A290105 1,1,1,1,2,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,2,1,3,1,1,1,
%U A290105 1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,2,1,1,2,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,2,1,1,2,3,1,2,1,1,1
%N A290105 a(n) = A156061(n) / A290103(n).
%H A290105 Antti Karttunen, <a href="/A290105/b290105.txt">Table of n, a(n) for n = 1..10000</a>
%H A290105 <a href="/index/Pri#prime_indices">Index entries for sequences computed from indices in prime factorization</a>
%F A290105 a(n) = A156061(n) / A290103(n).
%t A290105 Table[If[n == 1, 1, Apply[Times, #]/Apply[LCM, #] &@ PrimePi[FactorInteger[n][[All, 1]]]], {n, 120}] (* _Michael De Vlieger_, Aug 14 2017 *)
%o A290105 (Scheme) (define (A290105 n) (/ (A156061 n) (A290103 n)))
%Y A290105 Cf. A156061, A290103, A290104, A290106.
%K A290105 nonn
%O A290105 1,21
%A A290105 _Antti Karttunen_, Aug 13 2017