A137084 Numbers k such that k and k^2 use only the digits 2, 3, 5, 7 and 9.

3, 5, 23, 27, 73, 77, 235, 523, 527, 577, 723, 773, 5223, 5723, 5773, 5777, 7227, 27527, 57927, 72335, 75723, 97773, 232227, 232335, 239227, 239573, 522235, 597773, 727527, 757227, 2322235, 2357527, 5232335, 5723227, 5775777, 7597523, 23522235, 23922235, 23923335, 27797977, 57755723, 59377923, 59799277, 72755723, 229255223, 235357977

Offset

1,1

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..180

J. Wellons, Tables of Shared Digits [archived]

Example

279272793757923^2 = 77993293333355395752325273929.

Crossrefs

Sequence in context: A270163 A271417 A270912 * A271347 A222424 A067256

Adjacent sequences: A137081 A137082 A137083 * A137085 A137086 A137087

Keyword

base,nonn

Author

Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008

Status

approved