A137141 Numbers k such that k and k^2 use only the digits 4, 5, 6, 7 and 9.

7, 74, 76, 676, 67657, 74476, 97764, 746657, 759576, 774576, 974474, 6674576, 7469657, 7549474, 7745676, 9974766, 67597764, 67797976, 74474476, 74495476, 74669657, 74697764, 74799576, 75475676, 77457574, 97967574, 99777976, 666745676, 675647576, 744759657, 754947976, 977469676, 6676576666, 7449697764, 7459595476, 7469574657

Offset

1,1

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..174

J. Wellons, Tables of Shared Digits [archived]

Example

997494594794657^2 = 994995466644556959799995747649.

Crossrefs

Sequence in context: A367179 A106427 A106417 * A275618 A114472 A000901

Adjacent sequences: A137138 A137139 A137140 * A137142 A137143 A137144

Keyword

base,nonn,changed

Author

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

Status

approved