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A112904 a(n) is the least positive integer in base 10 containing n sevens that is divisible by n. 1
7, 770, 777, 77772, 777770, 7777770, 7777777, 777777776, 777777777, 77777777770, 777777777777, 7777777777776, 77477777777777, 777777777777770, 7777777777777770, 77777777777777776, 177777777777777777 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..17.

FORMULA

a(n) = n*A112905(n).

EXAMPLE

a(4) = 77772 because 77772 contains 4 sevens and is divisible by 4.

CROSSREFS

Cf. A112889-A112898, A112900-A112905, A112907-A112910.

Sequence in context: A027685 A248385 A242826 * A137050 A114911 A162089

Adjacent sequences:  A112901 A112902 A112903 * A112905 A112906 A112907

KEYWORD

base,nonn

AUTHOR

Ray G. Opao, Oct 05 2005

EXTENSIONS

Extended by Ray Chandler, Oct 09 2005

STATUS

approved

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Last modified September 22 02:48 EDT 2021. Contains 347605 sequences. (Running on oeis4.)