Numbers that are repdigits in base 4.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =5a(5) =10a(6) =15a(7) =21a(8) =42a(9) =63a(10) =85a(11) =170a(12) =255a(13) =341a(14) =682a(15) =1023a(16) =1365a(17) =2730a(18) =4095a(19) =5461a(20) =10922a(21) =16383a(22) =21845a(23) =43690a(24) =65535a(25) =87381a(26) =174762a(27) =262143a(28) =349525a(29) =699050