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Search: id:A069658
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| A069658 |
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a(1) = 1; a(n) = smallest nontrivial n-digit perfect power. |
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+0
1
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| 1, 16, 121, 1024, 10201, 100489, 1002001, 10004569, 100020001, 1000014129, 10000200001, 100000147984, 1000002000001, 10000002149284, 100000020000001, 1000000025191729, 10000000200000001, 100000000621806289, 1000000002000000001
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Powers of 10 are not allowed.
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FORMULA
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a(n) = (floor(sqrt(10)^(n-1))+1)^2 = (A017934(n-1)+1)^2. - Vladeta Jovovic (vladeta(AT)eunet.rs), Jun 30 2002
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CROSSREFS
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Cf. A061432, A017936.
Sequence in context: A082921 A014765 A081071 this_sequence A069667 A104265 A068880
Adjacent sequences: A069655 A069656 A069657 this_sequence A069659 A069660 A069661
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KEYWORD
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nonn,base
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 04 2002
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EXTENSIONS
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More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Jan 28 2003
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