Primes followed by a gap of 300.

Terms

a(0) =4758958741a(1) =5612345261a(2) =6169169561a(3) =6306815239a(4) =6646984159a(5) =7335508261a(6) =8645089003a(7) =8806019249a(8) =9047808247a(9) =9148138313a(10) =9466071347a(11) =9907846261a(12) =10055451683a(13) =11063821453a(14) =11475026363a(15) =11603081459a(16) =12292390637a(17) =12750876857a(18) =13833827471a(19) =14636472007a(20) =15876700949