Number of strong primes < 10^n.

Terms

a(0) =0a(1) =10a(2) =73a(3) =574a(4) =4543a(5) =37723a(6) =320991a(7) =2796946a(8) =24758534a(9) =222126290a(10) =2014200162a(11) =18425778658