0,3
Cf. A042186.
Sequence in context: A180817 A201438 A202510 * A201872 A082310 A014990
Adjacent sequences: A042184 A042185 A042186 * A042188 A042189 A042190
nonn,cofr,easy
N. J. A. Sloane (njas(AT)research.att.com).