OFFSET
1,1
COMMENTS
While checking for an arithmetic progression, leading zeros are discarded. With 108, for example, digits sorting gives 018, and this represents 18 where 1 and 8 are in arithmetic progression.
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Giovanni Teofilatto, Mar 02 2008
EXTENSIONS
Edited and extended by R. J. Mathar, Nov 01 2009
STATUS
approved