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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; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..4.

P. De Geest, Index to related sequences

Hisanori Mishima, Sporadic tridigital solutions

CROSSREFS

Cf. A058439.

Sequence in context: A077258 A272165 A304994 * A058464 A053951 A058460

Adjacent sequences:  A058437 A058438 A058439 * A058441 A058442 A058443

KEYWORD

nonn,base,hard,more

AUTHOR

Patrick De Geest, Nov 15 2000

STATUS

approved

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Last modified September 23 22:32 EDT 2020. Contains 337315 sequences. (Running on oeis4.)