OFFSET
1,1
COMMENTS
See A169684, A169681, A169685 for the digits of M(11)..M(13) separately. - M. F. Hasler, Jan 09 2013
EXAMPLE
Concatenate 3, 7, 31, 127, 8191, ...
CROSSREFS
KEYWORD
easy,nonn,base
AUTHOR
Omar E. Pol, Nov 10 2007
STATUS
approved