Odd nonprimes n such that n+d+1 is prime for all divisors d of n.

Terms

a(0) =1a(1) =9a(2) =35a(3) =39a(4) =65a(5) =125a(6) =749a(7) =755a(8) =905a(9) =935a(10) =989a(11) =1469a(12) =1829a(13) =1859a(14) =2519a(15) =3161a(16) =4269a(17) =4859a(18) =5165a(19) =5699a(20) =6005a(21) =7319a(22) =8309a(23) =8759a(24) =9155a(25) =9869a(26) =11129a(27) =12819a(28) =12851a(29) =14141