Semiprimes n such that 3*n + 4 is a square.

Terms

a(0) =4a(1) =15a(2) =39a(3) =55a(4) =95a(5) =119a(6) =319a(7) =407a(8) =559a(9) =799a(10) =1007a(11) =1159a(12) =1679a(13) =2407a(14) =2759a(15) =3007a(16) =3959a(17) =5207a(18) =6439a(19) =8639a(20) =10207a(21) =10679a(22) =10919a(23) =13199a(24) =16279a(25) =18407a(26) =19039a(27) =23407a(28) =24119a(29) =31007