1,11
Cf. A000005.
Sequence in context: A119969 A051343 A131193 this_sequence A114795 A135009 A092747
Adjacent sequences: A130629 A130630 A130631 this_sequence A130633 A130634 A130635
nonn
Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Aug 11 2007
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