From: utzoo!decvax!watmath!ghgonnet
Newsgroups: net.math
Title: numeros lindos
Article-I.D.: watmath.2761
Posted: Sun Jun 20 22:27:19 1982
Received: Tue Jun 22 02:55:18 1982

Many years ago, we met a nutty, self-taught type who was searching
for what he called "numeros lindos" (pretty numbers).  These numbers
have the property that when squared (or any power) the last digits
coincide with the initial number.

	E.g. 109376 ** 2 = 11963109376.

How many lindos are there with n digits? How to generate them?
Is this problem known in the literature?
(In base 10 this problem is not trivial, since 10 is not a prime)

					Gaston H. Gonnet
					Waterloo