Start with 1015 and repeatedly reverse the digits and add 4 to get the next term.

Terms

a(0) =1015a(1) =5105a(2) =5019a(3) =9109a(4) =9023a(5) =3213a(6) =3127a(7) =7217a(8) =7131a(9) =1321a(10) =1235a(11) =5325a(12) =5239a(13) =9329a(14) =9243a(15) =3433a(16) =3347a(17) =7437a(18) =7351a(19) =1541a(20) =1455a(21) =5545a(22) =5459a(23) =9549a(24) =9463a(25) =3653a(26) =3567a(27) =7657a(28) =7571a(29) =1761