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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: A072780 A124452 A004603 * A092926 A052311 A181786 Adjacent sequences:  A174948 A174949 A174950 * A174952 A174953 A174954 KEYWORD sign AUTHOR Carmen Tasis Montes (ctasis(AT)uniovi.es), Apr 02 2010 STATUS approved

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