OFFSET
0,1
COMMENTS
Fractal slowest increasing such sequence.
EXAMPLE
Sequence : 11,21,22,31,32,42,43,51,53,62,64,72,74,83,...
To erase :.*..*..*..*..*..*..*..*..*..*..*..*..*..*...
To keep .:..1..1..2..1..2..2..3..1..3..2..4..2..4..3...
leaving .:...11,...21,...22,...31,...32,...42,...43...
so when you concatenate all "kept digits" you get the concatenation of all integers of the original sequence.
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Eric Angelini, Jun 17 2005
STATUS
approved