Numbers k such that both k and A122111(k) [its conjugated prime factorization] are Ore's Harmonic numbers (A001599).

A336397

Numbers k such that both k and A122111(k) [its conjugated prime factorization] are Ore's Harmonic numbers (A001599).

Terms

    a(0) =1a(1) =6a(2) =753480a(3) =429520946400

External references