Number of cuban primes less than 10^n.

Terms

a(0) =0a(1) =1a(2) =4a(3) =11a(4) =28a(5) =64a(6) =173a(7) =438a(8) =1200a(9) =3325a(10) =9289a(11) =26494a(12) =76483a(13) =221530a(14) =645685a(15) =1895983a(16) =5593440a(17) =16578830a(18) =49347768a(19) =147402214a(20) =441641536a(21) =1326941536a(22) =3996900895a(23) =12066234206a(24) =36501753353