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 A369864 #8 Jun 26 2024 22:07:09
%S A369864 0,2,3,4,5,12,7,1,9,20,11,13,13,28,30,1,17,19,19,21,42,44,23,2,25,52,
%T A369864 1,29,29,90,31,1,66,68,70,2,37,76,78,2,41,126,43,45,46,92,47,2,49,51,
%U A369864 102,53,53,2,110,2,114,116,59,62,61,124,64,1,130,198,67,69,138
%N A369864 a(n) = Sum_{p|n, p prime} n^(mu(n/p)^2).
%F A369864 a(p^k) = p^k, for p prime and 1 <= k <= 2, else 1 if k >= 3. - _Wesley Ivan Hurt_, Jun 26 2024
%t A369864 Table[DivisorSum[n, n^(MoebiusMu[n/#]^2) &, PrimeQ[#] &], {n, 100}]
%Y A369864 Cf. A008683 (mu), A137851, A143519.
%K A369864 nonn,easy
%O A369864 1,2
%A A369864 _Wesley Ivan Hurt_, Feb 03 2024