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A073321 a(n)=A073259[A000040(n)]; Length of FixedPointList started with n-th prime and leading to corresponding composite number. 1
4, 4, 3, 4, 4, 3, 3, 4, 3, 5, 3, 4, 3, 5, 3, 4, 4, 4, 4, 3, 4, 5, 5, 3, 4, 4, 3, 4, 3, 3, 4, 4, 4, 5, 5, 4, 4, 3, 4, 3, 5, 4, 4, 4, 4, 4, 4, 5, 4, 4, 4, 4, 3, 5, 4, 3, 5, 4, 3, 4, 5, 4, 5, 4, 4, 4, 4, 4, 4, 5, 4, 4, 4, 6, 4, 4, 4, 5, 4, 4, 4, 4, 4, 4, 3, 4, 4, 4, 4, 4, 5, 4, 4, 6, 4, 4, 4, 4, 4, 5, 4, 4, 4, 4, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..105.

FORMULA

See Program.

EXAMPLE

a=10,p(10)=29, list={29,40,42,43,44}.

MATHEMATICA

lfp[x_] := Length[FixedPointList[x+PrimePi[ # ]+1&, x]]-1 Table[lfp[Prime[w]]-1, {w, 1, 128}]

CROSSREFS

Cf. A002808, A073259.

Sequence in context: A307836 A106147 A202393 * A055620 A072420 A258075

Adjacent sequences:  A073318 A073319 A073320 * A073322 A073323 A073324

KEYWORD

nonn

AUTHOR

Labos Elemer, Jul 29 2002

STATUS

approved

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Last modified September 24 22:33 EDT 2021. Contains 347651 sequences. (Running on oeis4.)