OFFSET
1,1
LINKS
Michael S. Branicky, Python program
Patrick De Geest, Squares containing at most three distinct digits, Index entries for related sequences
H. Mishima Squares consisted of 3 different digits
PROG
(Python) # see link for faster version
def aupto(limit):
alst = []
for k in range(1, limit+1):
if set(str(k*k)) <= set("235"): alst.append(k)
return alst
print(aupto(2*10**6)) # Michael S. Branicky, May 15 2021
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Patrick De Geest, Mar 15 2000
EXTENSIONS
More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 03 2005
One more term from Mishima's webpage added by Max Alekseyev, Jun 17 2011
a(16) from Zhao Hui Du, Feb 29 2024
STATUS
approved