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A174951 a(n)=Floor((FoF .. n times .. FoF)(n)), where F(x)=Log(Abs(x)); 0
0, -1, -3, 0, -2, -1, 0, -1, 1, -2, 0, -2, -1, -4, -1, -1, 0, -2, -2, 0, -1, -3, -2, 0, -1, -1, -1, -2, -1, -2, 0, 0, -1, -2, -1, 0, -1, -1, -3, 0, 0, -3, -1, -2, -1, -1, -1, -2, -2, 1, -1, -3, -1, -1, 1, -1, 0, -1, -2, 0, -2, 0, -1, 1, -1, -1, -1, -1, -2, -1, -2, -1, -1, 0, 0, -1, -4 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
EXAMPLE
Log[5]=1.60944..; Log[Log[5]]=0.475885;Log[Log[Log[5]]]=-0.742579; Log[ -Log[Log[Log[5]]]]=-297626;Log[ -Log[ -Log[Log[Log[5]]]]]= -1.21192 ==>a(5)=Floor[ -1.21192]=-2
MATHEMATICA
F[x_] := Log[Abs[x]]; a[n_]:=Nest[F, n, n]; Table[Floor[a[n]], {n, 115}]
CROSSREFS
Sequence in context: A351532 A291786 A004603 * A275326 A092926 A052311
KEYWORD
sign
AUTHOR
Carmen Tasis Montes (ctasis(AT)uniovi.es), Apr 02 2010
STATUS
approved

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Last modified March 1 06:29 EST 2024. Contains 370430 sequences. (Running on oeis4.)