Number of nontrivial prime powers p^k (k > 0) less than 10^n.
A267712
Number of nontrivial prime powers p^k (k > 0) less than 10^n.
Terms
- a(0) =7a(1) =35a(2) =193a(3) =1280a(4) =9700a(5) =78734a(6) =665134a(7) =5762859a(8) =50851223a(9) =455062595a(10) =4118082969a(11) =37607992088a(12) =346065767406
External references
- oeis: A267712