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A067083
Number of digits in n^(n^(n-1)).
0
1, 1, 5, 39, 437, 6051, 99425, 1893917, 41077012, 1000000001, 27011044252, 801840699303, 25952747043667, 909698753958571, 34333545124721025, 1388255822130839284, 59875111056395524697, 2743914679527468673294, 133153224151130627642479, 6821144143666773728762208
OFFSET
1,3
FORMULA
a(n) = floor(n^(n-1)*log(n)/log(10)) + 1. - Benoit Cloitre, Feb 20 2002
EXAMPLE
a(4) = 39 as 4^(4^3) = 4^64 = 3.4028236692... * 10^38.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Amarnath Murthy, Jan 05 2002
EXTENSIONS
More terms from Benoit Cloitre, Feb 20 2002
Offset corrected by Georg Fischer, Sep 28 2023
STATUS
approved