0,2
Cf. A042052.
Sequence in context: A081613 A115911 A065596 * A134775 A042573 A041651
Adjacent sequences: A042050 A042051 A042052 * A042054 A042055 A042056
nonn,cofr,easy
N. J. A. Sloane (njas(AT)research.att.com).