1295493

Appears in sequences

• Number of 4-valent labeled graphs with n nodes where multiple edges and loops are allowed.at n=7A005816
• G.f. satisfies: A(x) = 1 + x*A(x)/(1 - 2*x^2*A(x)^2).at n=14A101786
• Array read by antidiagonals: T(n,k) is the number of k-regular multigraphs on n labeled nodes, loops allowed, n >= 0, k >= 0.at n=73A333467