Add 5, then reverse digits!.

Terms

a(0) =0a(1) =5a(2) =1a(3) =6a(4) =11a(5) =61a(6) =66a(7) =17a(8) =22a(9) =72a(10) =77a(11) =28a(12) =33a(13) =83a(14) =88a(15) =39a(16) =44a(17) =94a(18) =99a(19) =401a(20) =604a(21) =906a(22) =119a(23) =421a(24) =624a(25) =926a(26) =139a(27) =441a(28) =644a(29) =946