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A065823
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6*EulerPhi[n] = 5*DivisorSigma[1,n];.
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2
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11, 527, 923, 36859, 40549, 55309, 88519, 120139, 138301, 280579, 293501, 313807, 529789, 719927, 2458859, 4864117, 6191413, 6811243, 7297877, 8402663, 8624107, 9487477, 10475821, 12356441, 12940957, 13624717, 13971229, 14869033, 15293137
(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,...,70
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PROG
| (PARI) { n=0; for (m=1, 10^9, if (6*eulerphi(m) == 5*sigma(m), write("b065823.txt", n++, " ", m); if (n==70, return)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Nov 01 2009]
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CROSSREFS
| Cf. A000010, A000203, A065818, A065819, A062699, A065822.
Sequence in context: A142809 A139198 A004800 * A049654 A179897 A185203
Adjacent sequences: A065820 A065821 A065822 * A065824 A065825 A065826
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KEYWORD
| easy,nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Nov 23 2001
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EXTENSIONS
| Terms a(16) - a(29) from Harry J. Smith (hjsmithh(AT)sbcglobal.net), Nov 01 2009
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