528770

Appears in sequences

• Number of certain rooted planar maps.at n=8A046647
• Triangle of rooted planar maps.at n=53A046651
• Triangle read by rows: T(n,k) is the number of nonseparable planar maps with r*n edges and a fixed outer face of r*k edges which are invariant under a rotation of 1/r for any r >= 2 (independent of actual value of r).at n=46A091599
• Number of 2 X 2 nonsingular matrices having all terms in {1,...,n}.at n=26A211056