Difference between pi(10^n) and A226945(n), where pi(x) is the number of primes <= x.

Terms

a(0) =0a(1) =0a(2) =0a(3) =3a(4) =7a(5) =-23a(6) =-73a(7) =-57a(8) =186a(9) =2126a(10) =3161a(11) =3885a(12) =12731a(13) =39462a(14) =-13815a(15) =-151907a(16) =1117163a(17) =5045162a(18) =-19274680a(19) =18700047a(20) =127912738a(21) =252060543a(22) =-656184524a(23) =2799754423a(24) =5292148929a(25) =27646015077a(26) =49454963317a(27) =271968742992