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A066887
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Numbers n such that OMEGA(phi(n))=OMEGA(n) where phi is the Euler totient function and OMEGA(x) is the number of repeated prime factors in x.
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1
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3, 9, 10, 14, 20, 22, 27, 28, 30, 40, 42, 44, 46, 50, 56, 60, 66, 80, 81, 84, 88, 90, 92, 94, 98, 100, 112, 118, 120, 126, 132, 138, 150, 160, 166, 168, 176, 180, 184, 188, 196, 198, 200, 214, 224, 236, 240, 242, 243, 250, 252, 264, 270, 276, 282, 294, 300, 320
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,1000
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PROG
| (PARI) { n=0; for (m=2, 10^10, if(bigomega(eulerphi(m)) == bigomega(m), write("b066887.txt", n++, " ", m); if (n==1000, return)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Apr 04 2010]
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CROSSREFS
| Sequence in context: A108865 A036119 A050852 * A030608 A118515 A191339
Adjacent sequences: A066884 A066885 A066886 * A066888 A066889 A066890
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KEYWORD
| nonn
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AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 26 2002
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