1,4
Cf. A003814.
Sequence in context: A110635 A071170 A108691 this_sequence A131777 A046607 A152717
Adjacent sequences: A010330 A010331 A010332 this_sequence A010334 A010335 A010336
nonn
N. J. A. Sloane (njas(AT)research.att.com), Walter Gilbert
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