1,1
Cf. A000045.
Sequence in context: A116457 A037155 A038944 this_sequence A119573 A001366 A093329
Adjacent sequences: A124078 A124079 A124080 this_sequence A124082 A124083 A124084
nonn
Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Dec 12 2006
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