OFFSET
0,3
COMMENTS
Could one say this is kind of fractal?
The definition seems to be the following: all terms have an odd number of digits, and are strictly increasing. Now delete all except the middle digits of each term. The result is the succession of digits of all the terms. We take the lexicographically earliest sequence satisfying these conditions. - N. J. A. Sloane, Aug 09 2012
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Eric Angelini, Apr 29 2005
STATUS
approved