Numbers that don't have a 1 and yet have one.

Terms

a(0) =2000008a(1) =2000080a(2) =2000082a(3) =2000083a(4) =2000084a(5) =2000085a(6) =2000086a(7) =2000087a(8) =2000088a(9) =2000089a(10) =2000800a(11) =2000802a(12) =2000803a(13) =2000804a(14) =2000805a(15) =2000806a(16) =2000807a(17) =2000808a(18) =2000809a(19) =2000820a(20) =2000822a(21) =2000823a(22) =2000824a(23) =2000825a(24) =2000826a(25) =2000827a(26) =2000828a(27) =2000829a(28) =2000830a(29) =2000832