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A072816 a(n) is the smallest integer such that the mantissa of 1/a(n) contains n. 0
1, 4, 3, 7, 2, 6, 7, 7, 11, 19, 9, 8, 23, 7, 19, 6, 17, 49, 21, 29, 19, 31, 13, 29, 4, 19, 29, 7, 17, 13, 19, 31, 3, 23, 17, 19, 27, 26, 23, 47, 17, 7, 23, 29, 22, 26, 17, 29, 51, 59, 29, 17, 26, 22, 18, 23, 7, 17, 47, 23, 21, 16, 19, 17, 23, 6, 49, 19, 13, 17, 7, 29, 19, 47, 29, 13 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

1/a(n) must contain also at least one nonzero digit after n if n ends with 0; e.g., a(10)=19 because 19 is the smallest integer whose reciprocal (0.052631578947368421052...) contains the digits "10" followed by at least one nonzero digit (to avoid 1/10 = 0.1000...)

LINKS

Table of n, a(n) for n=1..76.

EXAMPLE

11 is the smallest integer whose reciprocal (0.0909...) contains 9, hence a(9) = 11

CROSSREFS

Sequence in context: A077978 A192986 A336741 * A340012 A046548 A127752

Adjacent sequences:  A072813 A072814 A072815 * A072817 A072818 A072819

KEYWORD

base,nonn

AUTHOR

Benoit Cloitre, Aug 09 2002

EXTENSIONS

Corrected, edited, and more terms added by Jon E. Schoenfield, May 08 2010

STATUS

approved

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Last modified January 28 14:26 EST 2022. Contains 350656 sequences. (Running on oeis4.)