2020120

Appears in sequences

• a(n) is the number of c-nets with n+1 vertices and 2n edges, n >= 1.at n=9A001506
• Triangle read by rows: T(n,k) is the number of c-nets with n+1 faces and k+1 vertices, 1 <= k <= n. But see A290326 for a better version.at n=54A210252
• Triangle read by rows: T(n,k) is the number of c-nets with n+1 faces and k+1 vertices.at n=75A290326