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A374365
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Numbers m such that abs(Sum_{k=1..m} [k|m]*A008683(k)*(-1)^(2*k/5)) = 0.
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0
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11, 22, 31, 33, 41, 44, 55, 61, 62, 66, 71, 77, 82, 88, 93, 99, 101, 110, 121, 122, 123, 124, 131, 132, 142, 143, 151, 154, 155, 164, 165, 176, 181, 183, 186, 187, 191, 198, 202, 205, 209, 211, 213, 217, 220, 231, 241, 242, 244, 246, 248, 251, 253, 262, 264, 271
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OFFSET
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1,1
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COMMENTS
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Conjecture: Numbers having a prime factor congruent to 1 mod 10.
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LINKS
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MATHEMATICA
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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]]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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