%I #5 Jun 22 2021 10:56:41
%S 1,2,3,4,5,6,7,8,9,1024,2049,4098,8195,16388,32773,65542,131079,
%T 262152,524297,2097152,4194305,8388610,16777219,33554436,67108869,
%U 134217734,268435463,536870920,1073741833,3221225472,6442450945,12884901890,25769803779,51539607556
%N n_{2^n}.
%C See A122618 for notation.
%t Table[FromDigits[IntegerDigits[n],2^n],{n,40}] (* _Harvey P. Dale_, Jun 22 2021 *)
%K nonn,base
%O 1,2
%A _N. J. A. Sloane_, Sep 21 2006