Take list of even numbers, move left digit of each term to end of previous term.

Terms

a(0) =0a(1) =2a(2) =4a(3) =6a(4) =8a(5) =1a(6) =1a(7) =21a(8) =41a(9) =61a(10) =82a(11) =2a(12) =22a(13) =42a(14) =62a(15) =83a(16) =3a(17) =23a(18) =43a(19) =63a(20) =84a(21) =4a(22) =24a(23) =44a(24) =64a(25) =85a(26) =5a(27) =25a(28) =45a(29) =65