Numbers k such that prime(k + 1) == 7 (mod k).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =8a(5) =30a(6) =31a(7) =33a(8) =68a(9) =72a(10) =180a(11) =1052a(12) =6471a(13) =40083a(14) =40087a(15) =40090a(16) =40113a(17) =40120a(18) =100348a(19) =100360a(20) =100362a(21) =637334a(22) =4124588a(23) =10553439a(24) =10553442a(25) =10553455a(26) =10553478a(27) =10553505a(28) =10553512a(29) =10553827