Number of solutions x to n * pi(x) = x, where pi(x) = number of primes <= x.

Terms

a(0) =0a(1) =4a(2) =3a(3) =3a(4) =6a(5) =7a(6) =6a(7) =6a(8) =3a(9) =9a(10) =1a(11) =18a(12) =11a(13) =12a(14) =21a(15) =3a(16) =10a(17) =33a(18) =31a(19) =32a(20) =24a(21) =8a(22) =13a(23) =32a(24) =35a(25) =4a(26) =15a(27) =9a(28) =15a(29) =26