OFFSET
1,3
COMMENTS
The sequence starts with a(1) = 0 and is always extended with the smallest integer not yet present that does not lead to a contradiction.
LINKS
Jean-Marc Falcoz, Table of n, a(n) for n = 1..1059
EXAMPLE
There are 0 digit between "7" and "70"; there is 1 digit between the "7" of "70" and the "7" of "71" (this is the "0" of "70"); there are 2 digits between the "7" of "71" and the "7" of "72" (they are the "1" of "71" and the "8" of "8"); there are 3 digits between the "7" of "72" and the "7" of "17" (they are the "2" of "72", the "9" of "9" and the "1" of "17"); etc.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Eric Angelini and Jean-Marc Falcoz, Dec 02 2016
STATUS
approved