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).

3, 53, 11, 17, 317, 89, 1259, 2543, 7517, 16217, 15107, 33119, 60611, 671063, 2648057

Offset

1,1

Links

Table of n, a(n) for n=1..15.

Crossrefs

Cf. A000043, A139426, A143385, A143386.

Sequence in context: A347611 A302932 A364441 * A228452 A269458 A288867

Adjacent sequences: A143384 A143385 A143386 * A143388 A143389 A143390

Keyword

hard,more,nonn

Author

Pierre CAMI, Aug 11 2008

Status

approved