1,1
Cf. A020462.
Sequence in context: A101331 A087368 A087670 this_sequence A002427 A136134 A119497
Adjacent sequences: A138581 A138582 A138583 this_sequence A138585 A138586 A138587
nonn,base
Paul Curtz (bpcrtz(AT)free.fr), May 13 2008
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