A247312 Positive numbers not divisible by 10 whose squares remain squares when prefixed with 100.

11252109375, 47450841796875, 187605480615234375, 712096246922607421875, 2627953955633148193359375, 9500846300153588104248046875, 29357159521824837441192448139190673828125, 80932484400013426603726400434970855712890625, 218326368611836548856645001359283924102783203125

Offset: 1

Author

Chai Wah Wu, Sep 13 2014

Keywords

• nonn

Comments

Square roots of A247262.

Examples

			11252109375^2 = 126609965386962890625 and 100126609965386962890625 is square.
		

Links

• Chai Wah Wu, Table of n, a(n) for n = 1..168

Crossrefs

Cf. A247261, A247262, A247263, A247264.