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A053964 Numbers n such that n^2 contains only digits {4,7,9}. 1
2, 3, 7, 88, 212, 893, 69242288, 8819171038 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

P. De Geest, Squares containing at most three distinct digits, Index entries for related sequences

Author?, Source(txt)

CROSSREFS

Cf. A053965.

Sequence in context: A084729 A101117 A065002 * A062578 A062529 A058443

Adjacent sequences:  A053961 A053962 A053963 * A053965 A053966 A053967

KEYWORD

nonn,base,more

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com), Mar 15 2000.

EXTENSIONS

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 03 2005

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Last modified February 14 22:03 EST 2012. Contains 205668 sequences.