A137008 Numbers k such that k and k^2 use only the digits 1, 2, 5, 7 and 8.

1, 5, 11, 15, 85, 285, 715, 1585, 2285, 8711, 28511, 52515, 52715, 72285, 151285, 228511, 285515, 722211, 852715, 878511, 2858711, 2878511, 7182285, 7182515, 7271285, 8785711, 8877811, 8881585, 15878511, 28551285, 71782715, 75582585, 111887511, 125585515, 277881585, 278852515, 287275515, 727157285, 758785711, 882185515, 887285515

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..158

J. Wellons, Tables of Shared Digits [archived]

Example

275182172182585^2 = 75725227887125857782577282225.

Crossrefs

Sequence in context: A136973 A276037 A221743 * A137010 A137007 A137012

Adjacent sequences: A137005 A137006 A137007 * A137009 A137010 A137011

Keyword

base,nonn

Author

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

Status

approved