OFFSET
1,1
LINKS
FORMULA
The digits of the unique prime factors of n appear exactly once within n in any order, accounting for all the digits of n
EXAMPLE
Example: 104392, whose prime factors are 2*2*2*13049. The digits 2, 1, 3, 0, 4 and 9 appear exactly once within 104392.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Gil Broussard, Aug 13 2004
STATUS
approved