Least prime a(n) such that M(n)*(M(n)+a(n))-1 and M(n)*(M(n)+a(n))+1 are twin primes with M(i)=i-th Mersenne prime A000043(i).
A143387
Least prime a(n) such that M(n)*(M(n)+a(n))-1 and M(n)*(M(n)+a(n))+1 are twin primes with M(i)=i-th Mersenne prime A000043(i).
Terms
- a(0) =3a(1) =53a(2) =11a(3) =17a(4) =317a(5) =89a(6) =1259a(7) =2543a(8) =7517a(9) =16217a(10) =15107a(11) =33119a(12) =60611a(13) =671063a(14) =2648057
External references
- oeis: A143387