Total number of 7's digits in primes less than 10^n.
A231596
Total number of 7's digits in primes less than 10^n.
Terms
- a(0) =1a(1) =9a(2) =78a(3) =652a(4) =6172a(5) =58327a(6) =560506a(7) =5443074a(8) =53152746a(9) =521422184a(10) =5132090751a(11) =50642752951a(12) =500714890907
External references
- oeis: A231596