a(n) is the least k such that sigma(k) is a Fibonacci number when k is the product of n distinct primes, or 0 if no such k exists.
A290936
a(n) is the least k such that sigma(k) is a Fibonacci number when k is the product of n distinct primes, or 0 if no such k exists.
Terms
- a(0) =2a(1) =94a(2) =66a(3) =19290a(4) =2000006490
External references
- oeis: A290936