a(n) = n OR n^2 (applied to ternary expansions).

Terms

a(0) =1a(1) =5a(2) =12a(3) =16a(4) =26a(5) =42a(6) =52a(7) =71a(8) =90a(9) =100a(10) =122a(11) =147a(12) =178a(13) =206a(14) =231a(15) =259a(16) =296a(17) =342a(18) =370a(19) =401a(20) =453a(21) =484a(22) =539a(23) =591a(24) =646a(25) =701a(26) =756a(27) =784a(28) =842a(29) =930