1,3
Cf. A068000.
Sequence in context: A131680 A072218 A046844 this_sequence A004022 A083344 A063863
Adjacent sequences: A066950 A066951 A066952 this_sequence A066954 A066955 A066956
nonn
Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 01 2002
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