Number of primes of the form 7k+5 less than 10^n.
A091124
Number of primes of the form 7k+5 less than 10^n.
Terms
- a(0) =1a(1) =5a(2) =29a(3) =211a(4) =1604a(5) =13105a(6) =110787a(7) =960379a(8) =8474630a(9) =75842174a(10) =686346250a(11) =6267992446a(12) =57677618443a(13) =534157056416
External references
- oeis: A091124