0,1
Cf. A000040.
Sequence in context: A055918 A074404 A055064 this_sequence A164545 A054627 A019022
Adjacent sequences: A014344 A014345 A014346 this_sequence A014348 A014349 A014350
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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