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A073322
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a(n)=A073259[A002808(n)] and a(0)=3; Length of FixedPointList started with n-th nonprime and leading to corresponding composite number= c[c(n)].
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2
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3, 4, 3, 3, 4, 4, 4, 4, 3, 3, 4, 4, 3, 3, 4, 4, 3, 4, 4, 4, 4, 4, 3, 3, 4, 4, 3, 4, 4, 4, 3, 4, 4, 4, 4, 5, 4, 4, 3, 4, 4, 5, 4, 4, 3, 4, 4, 4, 3, 3, 4, 4, 4, 5, 4, 4, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 4, 4, 5, 4, 4, 4, 5, 4, 4, 3, 3, 3, 4, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 4, 5, 4, 4, 4, 5, 4, 4, 4, 5, 4
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,1
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LINKS
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FORMULA
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See Program.
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EXAMPLE
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list to n=0 corresponding to c[0]=1: {1,2,3,4} started with first nonprime ended with first composite; n=10: composite[10]=18, a(10)=length[{16,26,28}]=3.
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MATHEMATICA
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c[x_] := FixedPoint[x+c[ # ]+1&, x] lfp[x_] := Length[FixedPointList[x+c[ # ]+1&, x]]-1 Table[lfp[c[w]]-1, {w, 1, 128}]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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