Number of primes == 1 (mod 10) less than 10^n.
A073505
Number of primes == 1 (mod 10) less than 10^n.
Terms
- a(0) =0a(1) =5a(2) =40a(3) =306a(4) =2387a(5) =19617a(6) =166104a(7) =1440298a(8) =12711386a(9) =113761519a(10) =1029517130a(11) =9401960980a(12) =86516370000
External references
- oeis: A073505