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A058440 Squares composed of digits {0,4,7}, not ending with zero. 1
4, 7744, 407044, 4044074004774077447400004400704 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

P. De Geest, Index to related sequences

Hisanori Mishima, Sporadic tridigital solutions

CROSSREFS

Cf. A058439.

Sequence in context: A079232 A137045 A077258 * A058464 A053951 A058460

Adjacent sequences:  A058437 A058438 A058439 * A058441 A058442 A058443

KEYWORD

nonn,base,hard,more

AUTHOR

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

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Last modified February 13 10:03 EST 2012. Contains 205451 sequences.