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Search: id:A094469
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| A094469 |
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Numbers n such that sum of 11-th powers of divisors of n is divisible by the square of Euler-phi of n. |
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+0
1
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| 1, 2, 3, 6, 1645, 3260, 4935, 9870, 3831674, 11495022
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OFFSET
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1,2
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FORMULA
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A013959[n]/A000010[n]^2 is integer.
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MATHEMATICA
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Do[ If[ Mod[ DivisorSigma[11, n], EulerPhi[n]^2] == 0, Print[n]], {n, 10^7}] (from Robert G. Wilson v May 23 2004)
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CROSSREFS
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Cf. A015763, A000010, A091285, A013959.
Sequence in context: A015770 A015762 A093038 this_sequence A015766 A117024 A023048
Adjacent sequences: A094466 A094467 A094468 this_sequence A094470 A094471 A094472
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), May 19 2004
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EXTENSIONS
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a(9) from Robert G. Wilson v May 23 2004
a(10) from Labos E. (labos(AT)ana.sote.hu), May 26 2004
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