Number of figure 8's with 2n edges on the square lattice.

A003304

Number of figure 8's with 2n edges on the square lattice.

Terms

    a(0) =2a(1) =8a(2) =32a(3) =144a(4) =708a(5) =3696a(6) =20296a(7) =115624a(8) =676828a(9) =4044744a(10) =24565432

External references