Number of pairs of twin primes <= 10^n-th prime.
A093683
Number of pairs of twin primes <= 10^n-th prime.
Terms
- a(0) =4a(1) =25a(2) =174a(3) =1270a(4) =10250a(5) =86027a(6) =738597a(7) =6497407a(8) =58047180a(9) =524733511a(10) =4789919653a(11) =44073509102a(12) =408231310520
External references
- oeis: A093683