Numbers k such that both k and k+2 are de Polignac numbers (A006285).

Terms

a(0) =905a(1) =3341a(2) =3431a(3) =4151a(4) =4811a(5) =4841a(6) =5729a(7) =7387a(8) =7811a(9) =8921a(10) =10235a(11) =10511a(12) =11081a(13) =11435a(14) =12371a(15) =12731a(16) =13091a(17) =14021a(18) =14141a(19) =14381a(20) =14531a(21) =15041a(22) =15119a(23) =16025a(24) =16865a(25) =17369a(26) =18209a(27) =18611a(28) =18895a(29) =18897