0,2

Cf. A008691. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 18 2008]

Sequence in context: A015229 A109123 A113921 this_sequence A008691 A051964 A142686

Adjacent sequences: A047801 A047802 A047803 this_sequence A047805 A047806 A047807

nonn,easy,more

N. J. A. Sloane (njas(AT)research.att.com).