0,2
Cf. A002064.
Sequence in context: A043084 A113653 A133395 this_sequence A011790 A002295 A027393
Adjacent sequences: A050913 A050914 A050915 this_sequence A050917 A050918 A050919
nonn
N. J. A. Sloane (njas(AT)research.att.com), Dec 30 1999
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