0,2
Cf. A041718.
Sequence in context: A001007 A152015 A162256 * A133777 A025213 A116693
Adjacent sequences: A041716 A041717 A041718 * A041720 A041721 A041722
nonn,cofr,easy
N. J. A. Sloane (njas(AT)research.att.com).