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 A374365 #11 Jul 06 2024 14:05:14
%S A374365 11,22,31,33,41,44,55,61,62,66,71,77,82,88,93,99,101,110,121,122,123,
%T A374365 124,131,132,142,143,151,154,155,164,165,176,181,183,186,187,191,198,
%U A374365 202,205,209,211,213,217,220,231,241,242,244,246,248,251,253,262,264,271
%N A374365 Numbers m such that abs(Sum_{k=1..m} [k|m]*A008683(k)*(-1)^(2*k/5)) = 0.
%C A374365 Conjecture: Numbers having a prime factor congruent to 1 mod 10.
%t A374365 nn = 274; Flatten[Position[ParallelTable[Abs[Sum[If[Mod[n, k] == 0, 1, 0]*((-1)^( 2*k/5))*MoebiusMu[k], {k, 1, n}]], {n, 1, nn}], 0]]
%Y A374365 Cf. A008683, A009003, A050931, A228541.
%K A374365 nonn
%O A374365 1,1
%A A374365 _Mats Granvik_, Jul 06 2024