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A053962
Numbers k such that k^2 contains only digits {4,7,8}.
1
2, 22, 28, 88, 86478, 94227622, 9208064263934568938, 22019193553462506122, 6984617991328143315228383028
OFFSET
1,1
CROSSREFS
Cf. A053963.
Sequence in context: A368406 A137074 A137106 * A111771 A052001 A275029
KEYWORD
nonn,base,more
AUTHOR
Patrick De Geest, Mar 15 2000
EXTENSIONS
Two more terms from Mishima's page added by Max Alekseyev, Mar 10 2009
a(9) from Zhao Hui Du, Mar 09 2024
STATUS
approved