A167035 Squares that remain squares if prefixed with a 1.
225, 5625, 22500, 562500, 2250000, 5405625, 23765625, 56250000, 225000000, 540562500, 2127515625, 2376562500, 5625000000, 22500000000, 54056250000, 58503515625, 212751562500, 237656250000, 562500000000, 2250000000000, 5405625000000, 5850351562500
Offset: 1
Examples
225 = 15^2 is a square and becomes the square 1225 = 35^2 if a 1 is attached in front.
Links
- Chai Wah Wu, Table of n, a(n) for n = 1..1000
Extensions
Comment turned into example by R. J. Mathar, Oct 28 2009
More terms from Chai Wah Wu, Sep 11 2014