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Numbers n k such that 4*phi(nk) = 3*sigma(nk).
For m=10013, phi(m)=8640, sigma(m)=11520, 34560 = 4*phi = 3*sigma.
(PARI) { n=0; for (m=1, 10^9, if (4*eulerphi(m) == 3*sigma(m), write("b065819.txt", n++, " ", m); if (n==65, return)) ) } [From _\\ _Harry J. Smith_, Oct 31 2009]
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Jud McCranie, <a href="/A065819/b065819.txt">Table of n, a(n) for n = 1..10000</a> (first 65 terms by from Harry J. Smith)
Jud McCranie, <a href="/A065819/b065819_1.txt">Table of n, a(n) for n = 1..10000</a> (first 65 terms by Harry J. Smith)
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Numbers n such that 4*phi(n) = 3*sigma(n).
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Harry J. Smith, Jud McCranie, <a href="/A065819/b065819_1.txt">Table of n, a(n) for n = 1..10000</a> (first 65</a> terms by Harry J. Smith)
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