1,1
See A001605, which is the main entry for this sequence.
Sequence in context: A068482 A068499 A137172 this_sequence A061018 A130126 A121152
Adjacent sequences: A069741 A069742 A069743 this_sequence A069745 A069746 A069747
nonn
Steven L Plummer (plummers(AT)bigfoot.com), Apr 21 2002
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