A119511 a(n) is the smallest positive integer whose square starts with precisely n identical digits.

1, 15, 149, 2357, 10541, 57735, 745356, 1490712, 182574186, 2357022604, 298142397, 7453559925, 1490711985, 10540925533895, 74535599249993, 105409255338946, 7453559924999299, 14907119849998598, 471404520791031683

Offset: 1

Author

Tanya Khovanova, Jul 26 2006

Keywords

• base
• nonn

Examples

			Note that 15^2 = 225 and 149^2 = 22201.
		

Links

• Hans Havermann, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A119998.

Extensions

More terms from R. J. Mathar, Jul 29 2006