1,1
Cf. A156004
Sequence in context: A001913 A071845 A084704 this_sequence A106122 A106123 A156011
Adjacent sequences: A156002 A156003 A156004 this_sequence A156006 A156007 A156008
nonn
Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Feb 01 2009
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