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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

Table of n, a(n) for n=0..86.

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

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