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A069658
a(1) = 1; a(n) = smallest nontrivial n-digit perfect power.
0
1, 16, 121, 1024, 10201, 100489, 1002001, 10004569, 100020001, 1000014129, 10000200001, 100000147984, 1000002000001, 10000002149284, 100000020000001, 1000000025191729, 10000000200000001, 100000000621806289, 1000000002000000001
OFFSET
1,2
COMMENTS
Powers of 10 are not allowed.
FORMULA
a(n) = (floor(sqrt(10)^(n-1))+1)^2 = (A017934(n-1)+1)^2. - Vladeta Jovovic, Jun 30 2002
MATHEMATICA
Join[{1}, (Floor[Sqrt[10^Range[20]]]+1)^2] (* Harvey P. Dale, Mar 08 2022 *)
CROSSREFS
Sequence in context: A014765 A081071 A217022 * A069667 A104265 A068880
KEYWORD
nonn,base
AUTHOR
Amarnath Murthy, Apr 04 2002
EXTENSIONS
More terms from Sascha Kurz, Jan 28 2003
STATUS
approved