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: A075411 A114763 A069500 * A024058 A330579 A221554
Adjacent sequences: A053950 A053951 A053952 * A053954 A053955 A053956
Patrick De Geest, Mar 15 2000
Two more terms from Mishima's website added by Max Alekseyev, Apr 12 2009