Arrange digits of 2^n in descending order.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =61a(5) =32a(6) =64a(7) =821a(8) =652a(9) =521a(10) =4210a(11) =8420a(12) =9640a(13) =9821a(14) =86431a(15) =87632a(16) =66553a(17) =732110a(18) =644221a(19) =885422a(20) =8765410a(21) =9752210a(22) =9444310a(23) =8888630a(24) =77766211a(25) =55443332a(26) =88766410a(27) =877432211a(28) =866554432a(29) =987653210