1,1
Table of n, a(n) for n=1..26.
Sequence in context: A336631 A228129 A175125 * A186946 A057225 A309289
Adjacent sequences: A171922 A171923 A171924 * A171926 A171927 A171928
nonn,more
Hugo van der Sanden, Oct 23 2010, Oct 24 2010
approved