Numbers that are palindromic in bases 3, 9 and 27.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =8a(5) =10a(6) =20a(7) =364a(8) =728a(9) =730a(10) =1460a(11) =2920a(12) =5840a(13) =7300a(14) =7381a(15) =7462a(16) =14600a(17) =14681a(18) =14762a(19) =265720a(20) =531440a(21) =531442a(22) =532171a(23) =532900a(24) =1062884a(25) =1063613a(26) =1064342a(27) =2125768a(28) =2128684a(29) =2131600