The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A239684 Number of digits in the decimal expansion of n^4. 0
 1, 1, 2, 2, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS FORMULA a(n) = A055642(n^4). EXAMPLE For n=1, a(1)=1 because 1^4=1. For n=5, a(5)=3 because 5^4=625. MATHEMATICA Join[{1}, IntegerLength[Range[90]^4]] (* Harvey P. Dale, Sep 06 2015 *) CROSSREFS Sequence in context: A262558 A156876 A137397 * A062571 A277903 A102515 Adjacent sequences:  A239681 A239682 A239683 * A239685 A239686 A239687 KEYWORD nonn,base,easy AUTHOR Lorianne Kwak, Mar 24 2014 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 7 12:01 EDT 2022. Contains 355985 sequences. (Running on oeis4.)