Squares that become prime numbers when prefixed with an 8.

Terms

a(0) =9a(1) =81a(2) =2601a(3) =3969a(4) =4761a(5) =6561a(6) =25281a(7) =31329a(8) =35721a(9) =56169a(10) =59049a(11) =68121a(12) =71289a(13) =91809a(14) =131769a(15) =149769a(16) =168921a(17) =194481a(18) =199809a(19) =210681a(20) =221841a(21) =263169a(22) =301401a(23) =335241a(24) =370881a(25) =423801a(26) =439569a(27) =463761a(28) =480249a(29) =576081