a(n) = number of primes that are the initial prime of a twin prime pair that are > (10^n)*(10^n+1) and < (10^n)*(10^n+1)+2*(10^n)+2.
A135433
a(n) = number of primes that are the initial prime of a twin prime pair that are > (10^n)*(10^n+1) and < (10^n)*(10^n+1)+2*(10^n)+2.
Terms
- a(0) =2a(1) =0a(2) =3a(3) =16a(4) =75a(5) =495a(6) =3440a(7) =25185
External references
- oeis: A135433