Numbers k such that k and k^2 use only the digits 0, 1, 3, 6 and 7.

Terms

a(0) =0a(1) =1a(2) =6a(3) =10a(4) =60a(5) =100a(6) =131a(7) =600a(8) =1000a(9) =1310a(10) =6000a(11) =10000a(12) =10301a(13) =10376a(14) =11731a(15) =13100a(16) =60000a(17) =61376a(18) =100000a(19) =103010a(20) =103131a(21) =103760a(22) =106631a(23) =117310a(24) =131000a(25) =600000a(26) =603076a(27) =603131a(28) =613760a(29) =1000000