0,4
Cf. A000079.
Sequence in context: A049287 A006799 A056429 this_sequence A005176 A050335 A140860
Adjacent sequences: A133803 A133804 A133805 this_sequence A133807 A133808 A133809
nonn
Paul Curtz (bpcrtz(AT)free.fr), Jan 06 2008
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