

A053950


Numbers n such that n^2 contains only digits {4,5,7}.


1




OFFSET

1,1


LINKS

Table of n, a(n) for n=1..10.
Author?, Source(txt)
P. De Geest, Squares containing at most three distinct digits, Index entries for related sequences
H. Mishima, Sporadic tridigital solutions


CROSSREFS

Cf. A053951.
Sequence in context: A166848 A283631 A001904 * A266182 A012728 A012733
Adjacent sequences: A053947 A053948 A053949 * A053951 A053952 A053953


KEYWORD

nonn,base,more


AUTHOR

Patrick De Geest, Mar 15 2000.


EXTENSIONS

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005
One more term from Mishima's webpage added by Max Alekseyev, Jan 28 2012


STATUS

approved



