Numbers k such that prime(k+1) == 2 (mod k).

Terms

a(0) =1a(1) =9a(2) =67a(3) =437a(4) =441a(5) =2615a(6) =100349a(7) =100353a(8) =100359a(9) =637197a(10) =637305a(11) =27066969a(12) =27067049a(13) =27067101a(14) =27067113a(15) =27067115a(16) =179992839a(17) =179993001a(18) =55762149071a(19) =382465573491