1620491

Appears in sequences

• Triangular array E(n,k) counting not necessarily connected k-regular simple graphs on n vertices with girth at least 5.at n=86A185305
• Irregular triangle E(n,g) counting not necessarily connected 3-regular simple graphs on 2n vertices with girth at least g.at n=33A185330
• Number of not necessarily connected 3-regular simple graphs on 2n vertices with girth at least 5.at n=12A185335