OFFSET
1,2
COMMENTS
The sequence displaying every positive integer exactly twice is A026272. Construction method: we always fill the next empty "hole" with the smallest available integer. There is no proof that this sequence could go on forever. Terms computed by Gilles Sadowski.
LINKS
Eric Angelini, Kimberlike sequences
E. Angelini, Kimberlike sequences [Cached, with permission]
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Eric Angelini, Sep 02 2008
STATUS
approved