A137140 Numbers k such that k and k^2 use only the digits 4, 5, 6, 7 and 8.

8, 74, 76, 88, 684, 758, 766, 888, 6684, 6766, 6888, 7588, 7666, 8874, 66684, 67666, 68474, 68888, 74476, 74758, 76476, 76478, 76666, 86478, 86878, 666684, 667666, 668474, 675684, 675758, 676666, 688888, 744758, 747574, 766458, 766476, 766666, 6666684, 6668474, 6675684, 6675758, 6676666, 6748678, 6766666, 6845784, 6888888, 7455766

Offset

1,1

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..332

J. Wellons, Tables of Shared Digits [archived]

Example

676584568657574^2 = 457766678545555465868467565476.

Crossrefs

Sequence in context: A294809 A225161 A195754 * A187529 A282880 A190953

Adjacent sequences: A137137 A137138 A137139 * A137141 A137142 A137143

Keyword

base,nonn,changed

Author

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

Status

approved