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 A039779 Numbers k such that phi(k) is equal to A008473(k). 2
 1, 54, 99, 112, 540, 3344, 4743, 6720, 7644, 8307, 11088, 12852, 15225, 20300, 22320, 83160, 86304, 94944, 129504, 160208, 186992, 200640, 205712, 207264, 266266, 280592, 331731, 364941, 383724, 404550, 441232, 445050, 447876, 449072, 454575, 458052, 497781 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..37. EXAMPLE phi(54) = 18, 54 = 2^1*3^3, (2+1)*(3+3) = 18. MATHEMATICA Reap[For[n = 1, n < 500000, n++, If[EulerPhi[n] == Times @@ Plus @@@ FactorInteger[n], Print[n]; Sow[n]]]][[2, 1]] (* Jean-François Alcover, May 06 2017 *) CROSSREFS Cf. A000010, A008473. Sequence in context: A088986 A259717 A118150 * A044143 A044524 A095962 Adjacent sequences: A039776 A039777 A039778 * A039780 A039781 A039782 KEYWORD nonn AUTHOR Olivier Gérard STATUS approved

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Last modified August 2 19:53 EDT 2024. Contains 374875 sequences. (Running on oeis4.)