3,1
Cf. A003418, A060357.
Sequence in context: A149531 A083860 A141496 this_sequence A091798 A070198 A121934
Adjacent sequences: A060355 A060356 A060357 this_sequence A060359 A060360 A060361
nonn
N. J. A. Sloane (njas(AT)research.att.com), Apr 01 2001
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