a(n) is the smallest number m such that m has n distinct prime divisors and if p is a prime divisor of m then p*m - 1 is prime.
A092023
a(n) is the smallest number m such that m has n distinct prime divisors and if p is a prime divisor of m then p*m - 1 is prime.
Terms
- a(0) =2a(1) =6a(2) =30a(3) =420a(4) =32550a(5) =410970a(6) =55137810a(7) =1350063330a(8) =30644204010
External references
- oeis: A092023