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A053956
Numbers k such that k^2 contains only digits {4,6,7}.
1
2, 8, 26, 88, 2108238, 8165033238, 876154475408, 2538991467974, 2728823494615908, 253863101778786762, 815277035409723028858892
OFFSET
1,1
CROSSREFS
Cf. A053957.
Sequence in context: A289595 A343485 A298189 * A320802 A052543 A026638
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 Jon E. Schoenfield, Sep 04 2006
Three more terms from Mishima's website added by Max Alekseyev, May 07 2009
STATUS
approved