n*10^5-1, n*10^5-3, n*10^5-7 and n*10^5-9 are all prime.

Terms

a(0) =7190a(1) =7256a(2) =7991a(3) =15398a(4) =16406a(5) =20549a(6) =21011a(7) =24368a(8) =51794a(9) =68426a(10) =71762a(11) =73574a(12) =77792a(13) =80939a(14) =84995a(15) =98291a(16) =102488a(17) =112250a(18) =139595a(19) =160193a(20) =163931a(21) =164081a(22) =164981a(23) =167360a(24) =167585a(25) =170168a(26) =193040a(27) =220676a(28) =226136a(29) =227942