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A147550 Smallest n-digit number m such that phi(m) is minimal. 2
1, 10, 102, 1050, 10080, 101010, 1021020, 10210200, 100150050, 1009788780, 10039179150, 100614884370, 1002802450650, 10028024506500, 100093293239940, 1003203571630260, 10040258696397930, 100098336700452090, 1004819888620217670, 10034477941390913010, 100227034561924099830, 1004115014967006472530, 10014709889018759594670 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
For all n, A147551(n) = phi(a(n)).
LINKS
EXAMPLE
phi(10)=4 and there is no 2-digit number t such that phi(t)<4 so a(2)=10.
phi(102)=32 and there is no 3-digit number t such that phi(t)<32 also phi(100) and phi(101) are greater than 32, so a(3)=102.
CROSSREFS
Cf. A147551.
Sequence in context: A158242 A147636 A191014 * A162666 A061630 A062806
KEYWORD
base,nonn
AUTHOR
Farideh Firoozbakht, Nov 22 2008
EXTENSIONS
a(11)-a(31) from Max Alekseyev, Feb 02 2012, Feb 14 2018
STATUS
approved

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Last modified April 17 11:15 EDT 2024. Contains 371763 sequences. (Running on oeis4.)