1,3
Duplicate of A000479.
Sequence in context: A136524 A137887 A028365 * A000479 A181231 A111427
Adjacent sequences: A094047 A094048 A094049 * A094051 A094052 A094053
nonn,dead
Matthijs Coster (matthijs(AT)coster.demon.nl), Apr 29 2004