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