A136930 Numbers k such that k and k^2 use only the digits 0, 3, 4, 6 and 7.

0, 6, 60, 600, 6000, 60000, 66076, 600000, 660760, 6000000, 6607600, 60000000, 60003706, 60036706, 66036076, 66066376, 66076000, 600000000, 600037060, 600306344, 600367060, 600373006, 606336074, 660360760, 660663760, 660760000, 660760474, 6000000000, 6000036706, 6000370600, 6000637006, 6003063440, 6003670600, 6003730060

Offset: 1

Author

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

Keywords

• base
• nonn

Comments

Generated with DrScheme.

See also A058429-A058430. - M. F. Hasler, Jan 24 2008

Examples

			660760703770306^2 = 436604707647030077763607333636.
		

Links

• Jonathan Wellons, Table of n, a(n) for n = 1..181
• J. Wellons, Tables of Shared Digits [archived]