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A076829 a(n) = floor(log(log(n^n^n)) (or 0 if not finite). 0
0, 1, 3, 5, 8, 11, 14, 17, 20, 23, 27, 30, 34, 37, 41, 45, 49, 53, 57, 61, 65, 69, 73, 77, 81, 85, 90, 94, 98, 103, 107, 112, 116, 121, 125, 130, 134, 139, 144, 148, 153, 158, 163, 167, 172, 177, 182, 187, 192, 196, 201, 206, 211, 216, 221, 226, 231, 236, 241, 247 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..60.

FORMULA

a(n) = floor(n*log(n) + log(log(n))).

EXAMPLE

3^3^3 = 3^27 = 7625597484987. Log(log(7625597484987)) = 3.38..., so a(3)= 3.

MATHEMATICA

Table[ Floor[ n * Log[n] + Log[ Log[n]]], {n, 2, 60}]

CROSSREFS

Cf. A002488, A000312, A050504.

Sequence in context: A180124 A095375 A129260 * A084505 A084555 A102696

Adjacent sequences:  A076826 A076827 A076828 * A076830 A076831 A076832

KEYWORD

nonn

AUTHOR

Neil Fernandez, Nov 20 2002

EXTENSIONS

Edited by Robert G. Wilson v, Nov 22 2002

STATUS

approved

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Last modified January 21 05:39 EST 2020. Contains 331104 sequences. (Running on oeis4.)