OFFSET
0,3
COMMENTS
If 9 occurs anywhere except at the start of the number it is replaced by 0, but an initial 9 is replaced by 10. - N. J. A. Sloane, Mar 27 2009
EXAMPLE
6543 -> 7654
2109 -> 3210
98765 -> 109876, etc.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Ruben Gil, Mar 26 2009
STATUS
approved