Squares with initial digit '2'.

Terms

a(0) =25a(1) =225a(2) =256a(3) =289a(4) =2025a(5) =2116a(6) =2209a(7) =2304a(8) =2401a(9) =2500a(10) =2601a(11) =2704a(12) =2809a(13) =2916a(14) =20164a(15) =20449a(16) =20736a(17) =21025a(18) =21316a(19) =21609a(20) =21904a(21) =22201a(22) =22500a(23) =22801a(24) =23104a(25) =23409a(26) =23716a(27) =24025a(28) =24336a(29) =24649