Total number of 4's digits in primes less than 10^n.
A231593
Total number of 4's digits in primes less than 10^n.
Terms
- a(0) =0a(1) =3a(2) =34a(3) =360a(4) =3772a(5) =39006a(6) =397474a(7) =4022501a(8) =40604951a(9) =408986159a(10) =4113511677a(11) =41331763006a(12) =414971464358
External references
- oeis: A231593