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 A332683 #7 Feb 21 2020 10:02:52
%S A332683 1,2,5,6,12,8,20,15,23,18,37,19,47,28,38,37,66,31,76,41,61,52,96,44,
%T A332683 96,63,89,66,129,49,141,84,109,88,129,72,176,101,132,95,198,77,210,
%U A332683 116,142,129,232,99,226,122,186,144,269,114,232,149,214,169,305,110
%N A332683 a(n) = Sum_{k=1..n, gcd(n, k) = 1} ceiling(n/k).
%C A332683 Moebius transform of A006590.
%F A332683 a(n) = Sum_{d|n} mu(n/d) * A006590(d).
%t A332683 Table[Sum[Boole[GCD[n, k] == 1] Ceiling[n/k], {k, 1, n}], {n, 1, 60}]
%o A332683 (PARI) a(n) = sum(k=1, n, if (gcd(n, k) == 1, ceil(n/k))); \\ _Michel Marcus_, Feb 21 2020
%Y A332683 Cf. A006590, A008683, A116477, A332682.
%K A332683 nonn
%O A332683 1,2
%A A332683 _Ilya Gutkovskiy_, Feb 19 2020