Number of primes of the form 5k+2 less than 10^n.
A091117
Number of primes of the form 5k+2 less than 10^n.
Terms
- a(0) =2a(1) =7a(2) =47a(3) =309a(4) =2412a(5) =19622a(6) =166212a(7) =1440496a(8) =12712315a(9) =113764040a(10) =1029518338a(11) =9401997001
External references
- oeis: A091117