0,2

R. K. Guy, Unsolved Problems in Number Theory, B30.

Table of n, a(n) for n=0..77.

Sequence in context: A220854 A122816 A064007 * A073169 A166268 A239669

Adjacent sequences: A068565 A068566 A068567 * A068569 A068570 A068571

easy,nonn

Naohiro Nomoto, Mar 26 2002

approved