OFFSET
1,1
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..1000
EXAMPLE
625 = 25^2 is a square and becomes the square 5625 = 75^2 if a 5 is attached in front of its decimal representation.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Claudio Meller, Oct 27 2009
EXTENSIONS
Keyword:base added by R. J. Mathar, Oct 28 2009
More terms from Chai Wah Wu, Sep 11 2014
STATUS
approved