1,1
Cf. A020587. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 26 2008]
Sequence in context: A155108 A113188 A079153 * A067910 A171574 A181172
Adjacent sequences: A020613 A020614 A020615 * A020617 A020618 A020619
nonn,fini,full
David W. Wilson (davidwwilson(AT)comcast.net)