1,1
Cf. A068664, A068665, A068667, A068971, A068972, A068974.
Sequence in context: A016212 A037713 A037615 this_sequence A138649 A077711 A088775
Adjacent sequences: A068970 A068971 A068972 this_sequence A068974 A068975 A068976
nonn,base,hard
Patrick De Geest (pdg(AT)worldofnumbers.com), Mar 30 2002.
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