Arrange digits of 2^n in ascending order.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =23a(6) =46a(7) =128a(8) =256a(9) =125a(10) =124a(11) =248a(12) =469a(13) =1289a(14) =13468a(15) =23678a(16) =35566a(17) =11237a(18) =122446a(19) =224588a(20) =145678a(21) =122579a(22) =134449a(23) =368888a(24) =11266777a(25) =23334455a(26) =1466788a(27) =112234778a(28) =234455668a(29) =12356789