A137004 Numbers k such that k and k^2 use only the digits 1, 2, 5, 6 and 7.

1, 5, 11, 15, 16, 25, 26, 75, 76, 125, 165, 166, 275, 276, 511, 515, 516, 525, 526, 715, 716, 725, 1125, 1275, 1665, 1666, 2261, 2275, 2675, 5125, 5165, 7261, 7525, 11215, 11275, 12511, 12515, 12715, 16665, 16666, 25525, 25526, 25715, 25725, 26675, 26761, 27525, 51211, 72261, 72576, 125125, 125165, 125166, 125525, 125526, 127525, 161761, 165125

Offset: 1

Author

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

Keywords

• base
• nonn

Comments

Generated with DrScheme.

Subsequence of A137005 and A137006. - M. F. Hasler, Jan 24 2008

Examples

			756156171512576^2 = 571772155716556252275726155776.
		

Links

• Jonathan Wellons, Table of n, a(n) for n = 1..774
• J. Wellons, Tables of Shared Digits [archived]