Number of unrooted loops of length 2n on the square lattice that have winding number +1 around a fixed off-lattice point.

A292341

Number of unrooted loops of length 2n on the square lattice that have winding number +1 around a fixed off-lattice point.

Terms

    a(0) =1a(1) =16a(2) =232a(3) =3328a(4) =47957a(5) =696304a(6) =10187288a(7) =150087168a(8) =2224889247a(9) =33160970672a(10) =496608054904

External references