2,1
Cf. A055211 A098167.
Sequence in context: A026480 A126424 A138620 this_sequence A007238 A083875 A165291
Adjacent sequences: A098163 A098164 A098165 this_sequence A098167 A098168 A098169
nonn
Pierre CAMI (pierrecami(AT)tele2.fr), Aug 30 2004
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