0,2
Cf. A000108.
Sequence in context: A117107 A159609 A128326 this_sequence A027710 A009248 A012709
Adjacent sequences: A014330 A014331 A014332 this_sequence A014334 A014335 A014336
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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