Number of primes of the form 7k+1 less than 10^n.
A091120
Number of primes of the form 7k+1 less than 10^n.
Terms
- a(0) =0a(1) =3a(2) =28a(3) =203a(4) =1593a(5) =13063a(6) =110653a(7) =960023a(8) =8474221a(9) =75840762a(10) =686339040a(11) =6267973536a(12) =57677581458a(13) =534156926021
External references
- oeis: A091120