Add 4, then reverse digits; start with 0.

Terms

a(0) =0a(1) =4a(2) =8a(3) =21a(4) =52a(5) =65a(6) =96a(7) =1a(8) =5a(9) =9a(10) =31a(11) =53a(12) =75a(13) =97a(14) =101a(15) =501a(16) =505a(17) =905a(18) =909a(19) =319a(20) =323a(21) =723a(22) =727a(23) =137a(24) =141a(25) =541a(26) =545a(27) =945a(28) =949a(29) =359