Numbers k such that k and k^2 use only the digits 0, 1, 2, 6 and 9.

Terms

a(0) =0a(1) =1a(2) =10a(3) =11a(4) =96a(5) =100a(6) =101a(7) =110a(8) =960a(9) =996a(10) =1000a(11) =1001a(12) =1010a(13) =1011a(14) =1096a(15) =1100a(16) =1101a(17) =1619a(18) =9600a(19) =9960a(20) =9996a(21) =10000a(22) =10001a(23) =10010a(24) =10011a(25) =10096a(26) =10100a(27) =10110a(28) =10960a(29) =10996