A069658 - OEIS

%I #9 Mar 08 2022 12:50:32

%S 1,16,121,1024,10201,100489,1002001,10004569,100020001,1000014129,

%T 10000200001,100000147984,1000002000001,10000002149284,

%U 100000020000001,1000000025191729,10000000200000001,100000000621806289,1000000002000000001

%N a(1) = 1; a(n) = smallest nontrivial n-digit perfect power.

%C Powers of 10 are not allowed.

%F a(n) = (floor(sqrt(10)^(n-1))+1)^2 = (A017934(n-1)+1)^2. - _Vladeta Jovovic_, Jun 30 2002

%t Join[{1},(Floor[Sqrt[10^Range[20]]]+1)^2] (* _Harvey P. Dale_, Mar 08 2022 *)

%Y Cf. A061432, A017936.

%K nonn,base

%O 1,2

%A _Amarnath Murthy_, Apr 04 2002

%E More terms from _Sascha Kurz_, Jan 28 2003