1,1

The sequence is infinite since for every element k with '0' as last digit or no '0' at all every k*10^m is also in it.

3114 is okay, since it has three different digits while 3114^2 = 9696996 has only two.

Sequence in context: A141948 A102908 A141998 this_sequence A142945 A142079 A142224

Adjacent sequences: A061274 A061275 A061276 this_sequence A061278 A061279 A061280

nonn,base

Ulrich Schimke (ulrschimke(AT)aol.com)