464940

Appears in sequences

• Unitary harmonic numbers (those for which the unitary harmonic mean is an integer).at n=34A006086
• Infinitary harmonic numbers: harmonic mean of infinitary divisors is an integer.at n=28A063947
• Expansion of e.g.f. exp(x^4/4)/(1 - x).at n=9A319365
• Tri-unitary harmonic numbers: numbers k such that the harmonic mean of the tri-unitary divisors of k is an integer.at n=30A335387