0,1
Cf. A042323.
Sequence in context: A031434 A173089 A042320 * A042324 A044277 A044658
Adjacent sequences: A042319 A042320 A042321 * A042323 A042324 A042325
nonn,cofr,easy
N. J. A. Sloane (njas(AT)research.att.com).