Least k(n) such that 3*2^k(n)*M(n)-1 or 3*2^k(n)*M(n)+1 is prime (or both primes) with M(i)=i-th Mersenne prime.
A152097
Least k(n) such that 3*2^k(n)*M(n)-1 or 3*2^k(n)*M(n)+1 is prime (or both primes) with M(i)=i-th Mersenne prime.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =2a(6) =1a(7) =5a(8) =6a(9) =9a(10) =31a(11) =44a(12) =18a(13) =71a(14) =81a(15) =1097a(16) =64a(17) =789a(18) =42a(19) =17a(20) =908a(21) =722a(22) =1500a(23) =1496a(24) =5690a(25) =6720a(26) =3340a(27) =18768a(28) =9597a(29) =13835
External references
- oeis: A152097