Numbers k such that prime(k+1) == 3 (mod k).

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =70a(5) =440a(6) =1055a(7) =1058a(8) =6461a(9) =6466a(10) =6469a(11) =251752a(12) =4124468a(13) =27067036a(14) =27067112a(15) =69709709a(16) =69709957a(17) =465769835a(18) =8179002104a(19) =145935689357a(20) =382465573490