39896

Appears in sequences

• a(n) = A058094(n) - 3*A058094(n-1) + A058094(n-2) for n >=4.at n=11A092490
• G.f. A(x) satisfies 2 = Sum_{n=-oo..+oo} x^(4*n) * (1 - x^n)^(4*n) * A(x)^n.at n=17A379196
• Number of edges in a complete bipartite graph where the n vertices of each part are placed on the vertices, and on opposite sides, of a regular 2n-gon.at n=17A392973