0,2
Cf. A000123, A002061.
Sequence in context: A061810 A048701 A031159 this_sequence A013581 A133997 A057909
Adjacent sequences: A058036 A058037 A058038 this_sequence A058040 A058041 A058042
nonn
Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 16, 2002
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