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n_{2^n}.
0

%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