1,1
Table of n, a(n) for n=1..21.
Cf. A126990, A134196.
Sequence in context: A173196 A081662 A091652 * A053001 A053607 A209407
Adjacent sequences: A134194 A134195 A134196 * A134198 A134199 A134200
nonn
Artur Jasinski, Oct 13 2007
approved