2,1
Table of n, a(n) for n=2..31.
Cf. A055211 A098167.
Sequence in context: A026480 A126424 A138620 * A217445 A007238 A083875
Adjacent sequences: A098163 A098164 A098165 * A098167 A098168 A098169
nonn
Pierre CAMI, Aug 30 2004
approved