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A065758 Numbers n divided by n - phi(n) in approximately the golden ratio, i.e., n such that for some r, n is an r-digit minimizer of abs(k / (k - EulerPhi(k)) - (golden ratio phi)). 0
6, 10, 20, 40, 50, 80, 230, 460, 920, 5278, 10556, 21112, 36946, 42224, 68614, 73892, 84448, 136390, 272780, 545560, 681950, 6718090, 10635086, 21270172, 42540344, 74445602, 85080688, 478006930, 956013860 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Dual to A065657.
LINKS
EXAMPLE
abs(10/(10-phi(10))) = 0.0486237 (approximately) is minimal for 2-digit numbers. abs(460/(460-phi(460))) = 0.00168432 (approximately) is minimal for 3-digit numbers.
CROSSREFS
Cf. A065657.
Sequence in context: A362183 A153369 A107981 * A348838 A254028 A085274
KEYWORD
nonn,more
AUTHOR
Joseph L. Pe, Dec 04 2001
EXTENSIONS
a(18)-a(29) from Sean A. Irvine, Sep 12 2023
STATUS
approved

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Last modified March 28 08:22 EDT 2024. Contains 371236 sequences. (Running on oeis4.)