5638930

Appears in sequences

• a(n) = A027170(2n, n-1).at n=10A027173
• G.f. A(x) satisfies: 0 = Sum_{n=-oo..+oo} (-1)^n * x^(2*n) * (A(x) - x^n)^n * (1 - x^n*A(x))^n.at n=13A363138