1,4
Cf. A000931.
Adjacent sequences: A134717 A134718 A134719 this_sequence A134721 A134722 A134723
Sequence in context: A134435 A136718 A112362 this_sequence A019225 A002840 A007181
easy,nonn
Omar E. Pol (info(AT)polprimos.com), Nov 11 2007
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