OFFSET
1,2
COMMENTS
Example 3480 belongs to the sequence, because 34^2 - 80 = 1076 --> 10^2 - 76 = 24 --> 2^2 - 4 = 0.
LINKS
Jean-Marc Falcoz, Illustration of directed graph, zoomable picture (up to 1000).
Jean-Marc Falcoz, List of terms up to 11000.
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Jean-Marc Falcoz, Mar 06 2009
STATUS
approved