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A058460
Squares composed of digits {2,4,7}.
1
4, 7744, 7744424444247727742724, 2222747424244722424422447477474724
OFFSET
1,1
CROSSREFS
Cf. A058459.
Sequence in context: A058440 A058464 A053951 * A115050 A072724 A116271
KEYWORD
nonn,base,hard,more
AUTHOR
Patrick De Geest, Nov 15 2000
STATUS
approved