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 A093627 #15 Feb 16 2025 08:32:53
%S A093627 1,3,15,42,330,390,3990,9660,36540,41580,595980,651420,10630620,
%T A093627 11711700,13153140,29189160,594233640,630990360,14083949880,
%U A093627 15015120120,16411875480,17575838280,463140798120,484557713640,2690500012200
%N A093627 a(n) = lcm(1,2,3,...,n) * (sum of Farey fractions of order n).
%H A093627 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/FareySequence.html">Farey Sequence</a>.
%F A093627 a(n) = A093593(n)/A025527(n).
%t A093627 Farey[n_] := Union[ Flatten[ Join[{0}, Table[a/b, {b, n}, {a, b}]]]]; Table[LCM @@ Range[n] Plus @@ Farey[n], {n, 26}]
%Y A093627 Cf. A025527, A093593.
%K A093627 nonn
%O A093627 1,2
%A A093627 _Robert G. Wilson v_ and _Clark Kimberling_, Apr 06 2004