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A239683
Number of digits in decimal expansion of n^5.
0
1, 1, 2, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10
OFFSET
0,3
FORMULA
a(n) = A055642(n^5).
a(n) = k log n + O(1) where k = 2.1714... = 5/log 10. - Charles R Greathouse IV, Apr 01 2014
EXAMPLE
a(1) = 1 because 1^5 = 1, which has only 1 digit.
a(5) = 4 because 5^5 = 3125, which has 4 digits.
MATHEMATICA
Join[{1}, IntegerLength[Range[80]^5]] (* Harvey P. Dale, Jan 31 2025 *)
PROG
(PARI) vector(110, n, #digits(n^5)) \\ Joerg Arndt, Mar 24 2014
CROSSREFS
Cf. A000584.
Sequence in context: A030411 A194817 A211675 * A132913 A278814 A003160
KEYWORD
nonn,base,easy,changed
AUTHOR
Lorianne Kwak, Mar 24 2014
STATUS
approved