118762

Appears in sequences

• Number of polyhexes with n cells that do not tile the plane.at n=10A070767
• G.f. A(x) satisfies: A(x) = x + x^2 * exp(A(x) - A(-x^2)/2 + A(x^3)/3 - A(-x^4)/4 + ...).at n=20A345234