4,1

S. G. Whittington and J. P. Valleau, Figure eights on the square lattice: enumeration and Monte Carlo estimation, J. Phys. A 3 (1970), 21-27.

Adjacent sequences: A003302 A003303 A003304 this_sequence A003306 A003307 A003308

Sequence in context: A003445 A071007 A027617 this_sequence A076625 A139415 A119817

nonn

njas