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A053972
Numbers k such that k^2 contains only digits {6,7,9}.
1
3, 26, 264, 313, 3114, 3114113, 278922387, 881361264, 2603208937, 3125343176, 312518799063, 2770739969214, 8366461419063, 260723947264113, 9831977256725526
OFFSET
1,1
CROSSREFS
Cf. A053973.
Sequence in context: A062793 A300398 A048861 * A204561 A126738 A283298
KEYWORD
nonn,base,more
AUTHOR
Patrick De Geest, Mar 15 2000
EXTENSIONS
More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 14 2005
Two more terms from Jon E. Schoenfield, Sep 04 2006
a(14)-a(15) from Mishima's website, added by Max Alekseyev, Nov 30 2017
STATUS
approved