A058463 Numbers k such that k^2 contains only digits {3,4,7}.

2, 88, 688, 8564136525847038, 21150351639576462, 20913496712251033188, 1864878916830083039312, 271006150065722262703289312

Offset

1,1

Links

Table of n, a(n) for n=1..8.

Patrick De Geest, Index to related sequences

Hisanori Mishima, Sporadic tridigital solutions

Crossrefs

Cf. A058464.

Sequence in context: A273520 A066226 A058439 * A364974 A166848 A283631

Adjacent sequences: A058460 A058461 A058462 * A058464 A058465 A058466

Keyword

nonn,base,hard,more

Author

Patrick De Geest, Nov 15 2000

Extensions

More terms from Mishima's webpage added by Max Alekseyev, May 30 2009

a(8) from Zhao Hui Du, Mar 10 2024

Status

approved