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A068212 a(n) = phi(n) divided by its largest prime factor. 2
1, 1, 2, 1, 2, 2, 2, 2, 2, 2, 4, 2, 4, 4, 8, 2, 6, 4, 4, 2, 2, 4, 4, 4, 6, 4, 4, 4, 6, 8, 4, 8, 8, 4, 12, 6, 8, 8, 8, 4, 6, 4, 8, 2, 2, 8, 6, 4, 16, 8, 4, 6, 8, 8, 12, 4, 2, 8, 12, 6, 12, 16, 16, 4, 6, 16, 4, 8, 10, 8, 24, 12, 8, 12, 12, 8, 6, 16, 18, 8, 2, 8, 32, 6, 8, 8, 8, 8, 24, 4, 12, 2, 24 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,3

LINKS

Table of n, a(n) for n=3..95.

FORMULA

a(n) = A052126(A000010(n)) = A000010(n)/A068211(n) = A000010(n)/A006530(A000010(n)).

MATHEMATICA

epn[n_]:=Module[{e=EulerPhi[n]}, e/FactorInteger[e][[-1, 1]]]; Array[ epn, 100, 3] (* Harvey P. Dale, Apr 18 2012 *)

CROSSREFS

Cf. A000010, A006530, A052126, A068211.

Sequence in context: A078641 A072628 A193386 * A323015 A105194 A008335

Adjacent sequences:  A068209 A068210 A068211 * A068213 A068214 A068215

KEYWORD

nonn

AUTHOR

Labos Elemer, Feb 21 2002

STATUS

approved

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Last modified April 15 06:12 EDT 2021. Contains 342975 sequences. (Running on oeis4.)