OFFSET
0,1
COMMENTS
Obviously, each such number has at least ten digits; thence one can extend with diminishing probability. But a(211131)=1715193991236363935195556991413939 has 34 digits!
EXAMPLE
a(3) = 19838179232721317143537 because 19 == 3 mod 2, 198 == 3 mod 3, 1983 == 3 mod 4,..., 19838179232721317143537 == 3 mod 23; but no additional digit makes a 3 mod 24 number.
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Philippe LALLOUET (philip.lallouet(AT)orange.fr), Nov 04 2007
EXTENSIONS
Edited by Don Reble, Nov 07 2007
STATUS
approved