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A060473 a(n) = numerator of phi(n)/(n+1), where phi(n) is Euler's phi, A000010. 3
1, 1, 1, 2, 2, 2, 3, 4, 3, 4, 5, 4, 6, 2, 1, 8, 8, 6, 9, 8, 6, 10, 11, 8, 10, 4, 9, 12, 14, 8, 15, 16, 10, 16, 2, 12, 18, 6, 3, 16, 20, 12, 21, 4, 12, 22, 23, 16, 21, 20, 8, 24, 26, 18, 5, 8, 18, 28, 29, 16, 30, 10, 9, 32, 8, 20, 33, 32, 22, 24, 35, 24, 36, 12, 10, 36, 10, 24, 39, 32, 27, 40, 41 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
COMMENTS
a(A203966(n)) = 1. - Robert G. Wilson v, Jul 05 2014
LINKS
EXAMPLE
a(7) = 3 because phi(7)/(7+1) = 6/8 = 3/4.
MAPLE
with(numtheory, phi): seq(numer(phi(n)/(n+1)), n=1..50);
MATHEMATICA
Numerator/@Table[EulerPhi[n]/(n+1), {n, 90}] (* Harvey P. Dale, May 11 2011 *)
PROG
(PARI) { for (n=1, 1000, write("b060473.txt", n, " ", numerator(eulerphi(n)/(n + 1))); ) } \\ Harry J. Smith, Jul 05 2009
CROSSREFS
Sequence in context: A016729 A155940 A186963 * A055034 A362739 A112184
KEYWORD
easy,frac,nice,nonn
AUTHOR
Fabian Rothelius, Mar 16 2001
EXTENSIONS
More terms from Asher Auel, Mar 16 2001
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)