0,3
Cf. A042682.
Sequence in context: A175760 A080920 A086338 * A177773 A047660 A073418
Adjacent sequences: A042680 A042681 A042682 * A042684 A042685 A042686
nonn,cofr,easy
N. J. A. Sloane (njas(AT)research.att.com).