Numbers whose base-3 representation is a square when read in base 10.

Terms

a(0) =0a(1) =1a(2) =9a(3) =16a(4) =81a(5) =100a(6) =144a(7) =235a(8) =729a(9) =784a(10) =900a(11) =961a(12) =1296a(13) =1369a(14) =2115a(15) =6561a(16) =6724a(17) =7056a(18) =7225a(19) =8100a(20) =8649a(21) =11664a(22) =11881a(23) =12321a(24) =15985a(25) =19035a(26) =59049a(27) =59536a(28) =60516a(29) =61009