A137127 Numbers k such that k and k^2 use only the digits 3, 4, 6, 7 and 8.

6, 8, 88, 688, 874, 876, 8874, 8876, 68474, 86478, 88678, 683874, 683876, 6688374, 6883876, 87663474, 666834678, 668383478, 683847844, 684388374, 887348678, 6887436878, 8646643474, 8767376374, 66684883478, 66846374378, 68466373844, 87377836878, 87446363374, 668478484878, 683643676438, 684388368376, 684663763374

Offset

1,1

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..72

J. Wellons, Tables of Shared Digits [archived]

Example

684648643383478^2 = 468743764886836833787763376484.

Crossrefs

Sequence in context: A250256 A242490 A216796 * A013241 A013237 A013234

Adjacent sequences: A137124 A137125 A137126 * A137128 A137129 A137130

Keyword

base,nonn

Author

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

Status

approved