Least k such that x*k + 1 produces primes for x = 1..n and composite for x = n + 1.
A202778
Least k such that x*k + 1 produces primes for x = 1..n and composite for x = n + 1.
Terms
- a(0) =4a(1) =1a(2) =2a(3) =330a(4) =10830a(5) =25410a(6) =8224860a(7) =512820a(8) =12960606120a(9) =434491727670
External references
- oeis: A202778