Numbers k such that k^2 is the concatenation of two numbers 8*m and m.

Terms

a(0) =9a(1) =18a(2) =27a(3) =267a(4) =2667a(5) =26667a(6) =266667a(7) =2666667a(8) =26666667a(9) =266666667a(10) =2666666667a(11) =9063180828a(12) =9237472767a(13) =9411764706a(14) =9586056645a(15) =9760348584a(16) =9934640523a(17) =10108932462a(18) =10283224401a(19) =10457516340a(20) =10631808279a(21) =10806100218