Least positive integer k such that k*n+1 = prime(p) and k^2*n+1 = prime(q) for some pair of primes p and q.
A261437
Least positive integer k such that k*n+1 = prime(p) and k^2*n+1 = prime(q) for some pair of primes p and q.
Terms
- a(0) =2a(1) =1a(2) =286a(3) =1a(4) =7290a(5) =21a(6) =18a(7) =2472a(8) =12a(9) =1a(10) =20460a(11) =20a(12) =20692a(13) =105a(14) =4392a(15) =1a(16) =96816a(17) =1327a(18) =360a(19) =264a(20) =19850a(21) =2734a(22) =1854a(23) =5293a(24) =930a(25) =29526a(26) =98a(27) =622a(28) =9222a(29) =1
External references
- oeis: A261437