A058459 Numbers k such that k^2 contains only digits {2,4,7}.

2, 88, 88002411582, 47146022358675418

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. A058460.

Sequence in context: A362519 A012728 A012733 * A355272 A105268 A139881

Adjacent sequences: A058456 A058457 A058458 * A058460 A058461 A058462

Keyword

nonn,base,hard,more

Author

Patrick De Geest, Nov 15 2000

Status

approved