0,1
Table of n, a(n) for n=0..12.
J. L. Jacobsen and P. Zinn-Justin, A Transfer Matrix approach to the Enumeration of Knots
Sequence in context: A163022 A271031 A006437 * A285170 A017786 A035730
Adjacent sequences: A067640 A067641 A067642 * A067644 A067645 A067646
nonn
N. J. A. Sloane, Feb 05 2002
approved