Number of cuban primes < 10^(n/2).

Terms

a(0) =0a(1) =0a(2) =1a(3) =2a(4) =4a(5) =6a(6) =11a(7) =17a(8) =28a(9) =42a(10) =64a(11) =105a(12) =173a(13) =267a(14) =438a(15) =726a(16) =1200a(17) =2015a(18) =3325a(19) =5524a(20) =9289a(21) =15659a(22) =26494a(23) =44946a(24) =76483a(25) =129930a(26) =221530a(27) =377856a(28) =645685a(29) =1105802