Numbers k such that k and k^2 use only the digits 2, 3, 6, 8 and 9.

Terms

a(0) =3a(1) =6a(2) =63a(3) =83a(4) =833a(5) =836a(6) =983a(7) =2633a(8) =2886a(9) =2983a(10) =29883a(11) =62633a(12) =93233a(13) =96383a(14) =96886a(15) =98336a(16) =629836a(17) =826333a(18) =962633a(19) =6266333a(20) =8322823a(21) =9996963a(22) =26389323a(23) =26393633a(24) =28982233a(25) =29388233a(26) =29893633a(27) =29896963a(28) =29989886a(29) =62662823