0,3
Cf. A000957, A138414.
Sequence in context: A161122 A019581 A129627 this_sequence A066274 A052623 A116072
Adjacent sequences: A138410 A138411 A138412 this_sequence A138414 A138415 A138416
nonn,easy,more
N. J. A. Sloane (njas(AT)research.att.com), May 08 2008
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