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 A015832 Numbers k such that phi(k + 12) | sigma(k). 1
 6, 14, 23, 24, 30, 33, 38, 51, 54, 60, 66, 78, 84, 87, 96, 102, 109, 120, 132, 141, 159, 168, 174, 204, 210, 246, 248, 249, 267, 276, 280, 321, 330, 345, 354, 372, 378, 380, 406, 411, 426, 495, 506, 519, 537, 564, 591, 606, 636, 642, 690, 699, 789, 822, 852 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..2000 MATHEMATICA Select[Range[3000], Divisible[DivisorSigma[1, #], EulerPhi[12 + #]] &] (* David Nacin, Mar 03 2012 *) CROSSREFS Sequence in context: A079797 A093380 A123228 * A190753 A190740 A084583 Adjacent sequences: A015829 A015830 A015831 * A015833 A015834 A015835 KEYWORD nonn AUTHOR Robert G. Wilson v STATUS approved

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Last modified May 20 11:46 EDT 2024. Contains 372712 sequences. (Running on oeis4.)