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A039934 Smallest k for which k, 2*k, ..., n*k all contain the digit 3. 9
3, 153, 1153, 1183, 3465, 7673, 7673, 7673, 65913, 65913, 65913, 76923, 232767, 232767, 232767, 232767, 232767, 2307767, 2307767, 2307767, 2307767, 3076923, 6923313, 17078903, 19507893, 56695913, 56695913, 113322666, 113322666 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(169) > 7*10^11. - Giovanni Resta, Apr 27 2017

a(169) = a(170) = ... = a(188) = 1538461526061, and a(189) > 2*10^12. - David Radcliffe, Sep 12 2018

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..168

EXAMPLE

a(2)=153 since 153 and 306 both contain a 3, and 153 is the smallest number for which this is the case.

CROSSREFS

Cf. A039932, A039933, A039935, A039936, A039937, A039938, A039939, A039940.

Sequence in context: A189248 A209393 A095225 * A156990 A075514 A327058

Adjacent sequences:  A039931 A039932 A039933 * A039935 A039936 A039937

KEYWORD

base,nonn

AUTHOR

Erich Friedman

EXTENSIONS

More terms from Patrick De Geest, Oct 15 1999

STATUS

approved

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Last modified June 4 17:50 EDT 2020. Contains 334828 sequences. (Running on oeis4.)