a(n) is the smallest squarefree number m with n prime factors such that Sum_{prime q|m} 1/q - 1/m = P/Q, where P <> Q are primes, for n > 1, or a(n) = 1 if no such m.
A309378
a(n) is the smallest squarefree number m with n prime factors such that Sum_{prime q|m} 1/q - 1/m = P/Q, where P <> Q are primes, for n > 1, or a(n) = 1 if no such m.
Terms
- a(0) =1a(1) =6a(2) =105a(3) =1330a(4) =331230a(5) =4081530a(6) =127357230
External references
- oeis: A309378