OFFSET
1,2
LINKS
Zhao Hui Du, Table of n, a(n) for n = 1..31
Patrick De Geest, Squares containing at most three distinct digits, Index entries for related sequences
H. Mishima, Squares consisted of 3 different digits [From Max Alekseyev, May 29 2009]
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Mar 15 2000
EXTENSIONS
More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005
Two more terms from Jon E. Schoenfield, Sep 03 2006
Further terms from Mishima's webpage added by Max Alekseyev, May 29 2009
STATUS
approved