Primes that become squares when prefixed with a 4.

Terms

a(0) =41a(1) =761a(2) =23801a(3) =31649a(4) =39569a(5) =63761a(6) =1100921a(7) =1951529a(8) =2497361a(9) =2810849a(10) =3046721a(11) =3678881a(12) =4715969a(13) =4796249a(14) =5118089a(15) =5198729a(16) =5441081a(17) =5846441a(18) =5927729a(19) =6009089a(20) =6498761a(21) =6662561a(22) =6908801a(23) =7238129a(24) =7983329a(25) =8149721a(26) =8483369a(27) =8734361a(28) =9744809a(29) =9829481