0,3
Comments and examples
Cf. A056287, A058759.
Sequence in context: A103978 A073910 A115251 * A104617 A104618 A104616
Adjacent sequences: A057238 A057239 A057240 * A057242 A057243 A057244
nonn,nice,hard,more
Richard Schroeppel (rschroe(AT)sandia.gov), Jan 10 2001
a(5) <= 23.