Number of primes of the form (x+1)^7 - x^7 less than 10^n.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =3a(6) =6a(7) =7a(8) =8a(9) =10a(10) =14a(11) =18a(12) =25a(13) =34a(14) =46a(15) =60a(16) =89a(17) =120a(18) =165a(19) =227a(20) =298a(21) =415a(22) =590a(23) =821a(24) =1152a(25) =1606a(26) =2240a(27) =3188a(28) =4438a(29) =6208