Primes that become squares when prefixed with a 7.

Terms

a(0) =29a(1) =569a(2) =1289a(3) =7841a(4) =62129a(5) =306209a(6) =436529a(7) =502121a(8) =634169a(9) =667361a(10) =935489a(11) =1723961a(12) =1927361a(13) =2131049a(14) =2437121a(15) =2539289a(16) =2948681a(17) =3153809a(18) =3564929a(19) =4080449a(20) =5116889a(21) =5846681a(22) =6160529a(23) =6790169a(24) =7316849a(25) =7845329a(26) =8269409a(27) =8481881a(28) =8694641a(29) =8801129