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Search: id:A061439
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| A061439 |
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Largest number whose cube has n digits. |
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+0
5
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| 2, 4, 9, 21, 46, 99, 215, 464, 999, 2154, 4641, 9999, 21544, 46415, 99999, 215443, 464158, 999999, 2154434, 4641588, 9999999, 21544346, 46415888, 99999999, 215443469, 464158883, 999999999, 2154434690, 4641588833, 9999999999
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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a(n)=ceil(10^(n/3))-1 - Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 30 2003
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EXAMPLE
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a(5) = 46, 46^3 = 97336 has 5 digits, while 47^3 = 103823 has 6 digits.
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MAPLE
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A061439 := n->ceil(10^(i/3))-1;
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CROSSREFS
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a(n) is one more than the corresponding term of A018005. Cf. A061435.
Adjacent sequences: A061436 A061437 A061438 this_sequence A061440 A061441 A061442
Sequence in context: A035056 A093698 A091619 this_sequence A027711 A084634 A137256
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KEYWORD
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nonn,base,easy
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 03 2001
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EXTENSIONS
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More terms from Larry Reeves (larryr(AT)acm.org), May 16 2001
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