1,1
Cf. A001122 A000040.
Adjacent sequences: A141228 A141229 A141230 this_sequence A141232 A141233 A141234
Sequence in context: A063038 A066769 A088607 this_sequence A047623 A007950 A034936
nonn
Vladimir Shevelev (shevelev(AT)bgu.ac.il), Jun 16 2008
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