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A053950 Numbers n such that n^2 contains only digits {4,5,7}. 1
2, 88, 6888, 6912, 7588, 68962, 6674412, 2749137588, 7466242412, 8629863583949388 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 25 19:48 EDT 2017. Contains 292500 sequences.