Number of primes among first 10^n primes that have first and last digits both equal 1.
A145709
Number of primes among first 10^n primes that have first and last digits both equal 1.
Terms
- a(0) =1a(1) =6a(2) =39a(3) =393a(4) =7737a(5) =103788a(6) =1230898a(7) =13344414a(8) =120133545a(9) =1092391851
External references
- oeis: A145709