Composite numbers k such that k+d+1 is prime for all divisors d of k greater than 1.

Terms

a(0) =8a(1) =9a(2) =35a(3) =39a(4) =65a(5) =119a(6) =125a(7) =219a(8) =341a(9) =515a(10) =749a(11) =755a(12) =905a(13) =935a(14) =989a(15) =1043a(16) =1119a(17) =1343a(18) =1355a(19) =1469a(20) =1649a(21) =1829a(22) =1859a(23) =2519a(24) =3005a(25) =3161a(26) =3563a(27) =3953a(28) =4193a(29) =4269