A053950 Numbers k such that k^2 contains only digits {4,5,7}.

2, 88, 6888, 6912, 7588, 68962, 6674412, 2749137588, 7466242412, 8629863583949388, 27341447393189418631675507588

Offset

1,1

Links

Table of n, a(n) for n=1..11.

Author?, Source(txt)

Patrick 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 A362519 A012728

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

a(11) from Zhao Hui Du, Mar 09 2024

Status

approved