Squarefree numbers (from A005117) with prime divisors in a 2p-1 progression.

Terms

a(0) =6a(1) =15a(2) =30a(3) =91a(4) =703a(5) =1891a(6) =2701a(7) =12403a(8) =18721a(9) =38503a(10) =49141a(11) =51319a(12) =79003a(13) =88831a(14) =104653a(15) =146611a(16) =188191a(17) =218791a(18) =226801a(19) =269011a(20) =286903a(21) =385003a(22) =497503a(23) =597871a(24) =665281a(25) =721801a(26) =736291a(27) =765703a(28) =873181a(29) =954271