1,1
Table of n, a(n) for n=1..22.
Cf. A170853, A005836 and the Cantor set sequence A121153.
Sequence in context: A097570 A185641 A031966 * A137487 A069478 A060665
Adjacent sequences: A170827 A170828 A170829 * A170831 A170832 A170833
nonn,more
N. J. A. Sloane, Feb 22 2010
approved