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
Links
- 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.
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