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A075048 10-smooth numbers that show their prime factors. 0
1, 2, 3, 5, 7, 135, 175, 735, 1715, 13122, 131712, 2333772 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

A number n is in the sequence if it has only noncomposite digits (1,2,3,5,7) and a prime p divides n if and only if p is a digit of n.

No other terms below 10^13.

No more terms < 10^100. - David Wasserman, Jan 04 2005

LINKS

Table of n, a(n) for n=0..11.

EXAMPLE

131712 is a member because 131712 = 2*2*2*2*2*2*2*3*7*7*7; the prime factors are digits and the digits are factors.

CROSSREFS

Sequence in context: A157869 A046705 A054218 * A281021 A230046 A098463

Adjacent sequences:  A075045 A075046 A075047 * A075049 A075050 A075051

KEYWORD

base,more,nonn

AUTHOR

Amarnath Murthy, Sep 03 2002

EXTENSIONS

Edited by Don Reble, Jun 07 2003

STATUS

approved

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Last modified November 20 17:09 EST 2019. Contains 329337 sequences. (Running on oeis4.)