1,2
Cf. A087429.
Adjacent sequences: A137219 A137220 A137221 this_sequence A137223 A137224 A137225
Sequence in context: A092982 A030566 A007963 this_sequence A077641 A112672 A025765
easy,nonn
Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Mar 07 2008
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