608583680

Appears in sequences

• Number of rooted bicubic maps: a(n) = (8*n-4)*a(n-1)/(n+2) for n >= 2, a(0) = a(1) = 1.at n=13A000257
• Triangle read by rows: T(n,k) is the number of rooted hypermaps of genus k with n darts.at n=42A321710