Primes that become squares when prefixed with a 1.

Terms

a(0) =521a(1) =10889a(2) =23201a(3) =27449a(4) =31769a(5) =36161a(6) =45161a(7) =54449a(8) =78929a(9) =99809a(10) =1148921a(11) =1229201a(12) =1309769a(13) =1431161a(14) =2047841a(15) =2257001a(16) =2299049a(17) =2467961a(18) =2595401a(19) =2680721a(20) =2766329a(21) =2809241a(22) =2895281a(23) =2938409a(24) =3024881a(25) =3329801a(26) =3417569a(27) =3461561