Numbers that are repdigits in base 3.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =8a(5) =13a(6) =26a(7) =40a(8) =80a(9) =121a(10) =242a(11) =364a(12) =728a(13) =1093a(14) =2186a(15) =3280a(16) =6560a(17) =9841a(18) =19682a(19) =29524a(20) =59048a(21) =88573a(22) =177146a(23) =265720a(24) =531440a(25) =797161a(26) =1594322a(27) =2391484a(28) =4782968a(29) =7174453