Number of twin self-primes <= 10^n.

A382457

Number of twin self-primes <= 10^n.

Terms

    a(0) =2a(1) =2a(2) =2a(3) =2a(4) =12a(5) =87a(6) =534a(7) =3683a(8) =27738a(9) =231431a(10) =2061879

External references