Numbers whose base-4 representation is a square when read in base 10.

Terms

a(0) =0a(1) =1a(2) =16a(3) =25a(4) =256a(5) =289a(6) =400a(7) =441a(8) =673a(9) =1761a(10) =1849a(11) =4096a(12) =4225a(13) =4624a(14) =4761a(15) =6400a(16) =6561a(17) =7056a(18) =7713a(19) =10768a(20) =13401a(21) =28176a(22) =29584a(23) =65536a(24) =66049a(25) =67600a(26) =68121a(27) =73984a(28) =74529a(29) =76176