Squares of the form 3S + 4, where S is a semiprime.

Terms

a(0) =16a(1) =49a(2) =121a(3) =169a(4) =289a(5) =361a(6) =961a(7) =1225a(8) =1681a(9) =2401a(10) =3025a(11) =3481a(12) =5041a(13) =7225a(14) =8281a(15) =9025a(16) =11881a(17) =15625a(18) =19321a(19) =25921a(20) =30625a(21) =32041a(22) =32761a(23) =39601a(24) =48841a(25) =55225a(26) =57121a(27) =70225a(28) =72361a(29) =93025