Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A018005
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A018005 Smallest number whose cube has n digits. +0
7
1, 3, 5, 10, 22, 47, 100, 216, 465, 1000, 2155, 4642, 10000, 21545, 46416, 100000, 215444, 464159, 1000000, 2154435, 4641589, 10000000, 21544347, 46415889, 100000000, 215443470, 464158884, 1000000000, 2154434691, 4641588834 (list; graph; listen)
OFFSET

1,2

FORMULA

Powers of cube root of 10 rounded up.

EXAMPLE

a(5) = 22, 22^3 = 10648 has 5 digits, while 21^3 = 9261 has 4 digits.

CROSSREFS

Cf. A061434, A061439.

Sequence in context: A024424 A018107 A053709 this_sequence A080522 A132332 A002039

Adjacent sequences: A018002 A018003 A018004 this_sequence A018006 A018007 A018008

KEYWORD

nonn,base,easy

AUTHOR

njas

EXTENSIONS

More terms from Larry Reeves (larryr(AT)acm.org), May 16 2001

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified July 25 02:12 EDT 2008. Contains 142294 sequences.


AT&T Labs Research