1,2
Table of n, a(n) for n=1..9.
Hugo van der Sanden, Table of n, a(n) for n = 1..200, with -1 if n has not yet been found
Sequence in context: A201508 A322126 A272241 * A104904 A272247 A167748
Adjacent sequences: A171936 A171937 A171938 * A171940 A171941 A171942
nonn,more
Hugo van der Sanden, Oct 23 2010, Oct 24 2010
approved