

A125722


Greatest product of two numbers made up together of decimal digits 0 to n once.


1




OFFSET

1,2


LINKS



EXAMPLE

The greatest product of two numbers using digits 0 through 7,for instance, occurs when the difference between them is least (since X*Y={(X+Y)^2  (XY)^2}/4), i.e., when the product equals 7420*6531=48640020=a(7).


CROSSREFS



KEYWORD

fini,full,nonn,base


AUTHOR



EXTENSIONS



STATUS

approved



