A136832 Numbers k such that k and k^2 use only the digits 0, 1, 2, 7 and 8.

0, 1, 10, 11, 100, 101, 110, 1000, 1001, 1010, 1011, 1100, 1101, 10000, 10001, 10010, 10011, 10100, 10110, 11000, 11001, 11010, 87811, 100000, 100001, 100010, 100011, 100100, 100101, 100110, 101000, 101001, 101100, 110000, 110001, 110010, 110100, 878110, 1000000, 1000001, 1000010, 1000011, 1000100, 1000101, 1000110, 1001000, 1001010

Offset: 1

Author

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

Keywords

• base
• nonn

Comments

Generated with DrScheme.

Examples

			282880202080101^2 = 80021208728878778127220170201.
		

Links

• Jonathan Wellons, Table of n, a(n) for n = 1..1393
• J. Wellons, Tables of Shared Digits [archived]