

A075048


10smooth numbers that show their prime factors.


0



1, 2, 3, 5, 7, 135, 175, 735, 1715, 13122, 131712, 2333772
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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



