286000

Appears in sequences

• Triangulations of the disk G_{n,0}.at n=9A002709
• Square array T(n,m) (n>=0, m>=0) read by antidiagonals downwards giving number of rooted triangulations of type [n,m] up to orientation-preserving isomorphisms.at n=54A262586
• Expansion of Product_{k>=1} ((1 + x^(2*k)) / (1 - x^k))^k.at n=21A285462
• Array read by antidiagonals: T(n,k) is the number of 3-connected triangulations of a disk up to orientation-preserving isomorphisms with n interior nodes and k nodes on the boundary, n >= 1, k >= 3.at n=44A341923
• a(n) = Sum_{k=0..n} floor((k/2)^2)*n^2. Row sums of A391996.at n=20A391997