A137128 Numbers k such that k and k^2 use only the digits 3, 4, 6, 7 and 9.

3, 6, 7, 63, 9694, 797963, 967974, 973364, 9736363, 99967343, 796479376, 973639376, 7977339643, 9667799474, 9676449736, 9676773736, 9997339643, 9997396643, 79774334643, 79979334643, 96676443736, 96676763736, 97333344474, 97464694364, 797796639376, 966433977764, 966667677974, 966676674694, 967649977764

Offset

1,1

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..91

J. Wellons, Tables of Shared Digits [archived]

Example

997364767473736^2 = 994736479397939479743449797696.

Crossrefs

Sequence in context: A233209 A186521 A067697 * A256372 A330890 A337404

Adjacent sequences: A137125 A137126 A137127 * A137129 A137130 A137131

Keyword

base,nonn,changed

Author

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

Status

approved