A137039 Numbers k such that k and k^2 use only the digits 1, 3, 6, 7 and 9.

1, 3, 6, 13, 19, 31, 37, 63, 131, 313, 363, 369, 796, 1319, 3376, 11731, 11736, 17796, 31131, 31619, 61131, 61613, 61637, 117131, 133937, 191363, 193176, 311637, 311736, 333736, 336736, 369613, 616376, 969119, 1167637, 1316736, 1913619, 1917637, 1991637, 3116376, 3116619, 3336731, 3337363, 3371376, 6113376, 6139376, 6139769, 6319313

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..392

J. Wellons, Tables of Shared Digits [archived]

Example

967976196917637^2 = 936977917799131961979761663769.

Crossrefs

Sequence in context: A277690 A136484 A263621 * A137035 A137042 A080546

Adjacent sequences: A137036 A137037 A137038 * A137040 A137041 A137042

Keyword

base,nonn,changed

Author

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

Status

approved