Table of n, a(n) for n=1..8.
P. 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, Apr 12 2009]
Sequence in context: A181235 A246852 A060601 * A261198 A052077 A124604
Adjacent sequences: A053949 A053950 A053951 * A053953 A053954 A053955
Patrick De Geest, Mar 15 2000
Two more terms from Mishima's page added by Max Alekseyev, Apr 12 2009