Primes of the form 10n^3-1.

Terms

a(0) =79a(1) =269a(2) =1249a(3) =5119a(4) =13309a(5) =33749a(6) =79999a(7) =138239a(8) =175759a(9) =243889a(10) =548719a(11) =851839a(12) =911249a(13) =1105919a(14) =1249999a(15) =2053789a(16) =3285089a(17) =3732479a(18) =5927039a(19) =8573749a(20) =8847359a(21) =10612079a(22) =11248639a(23) =18158479a(24) =22999679a(25) =26280719a(26) =27439999a(27) =29242069