418275

Appears in sequences

• Triangle read by rows: T(n,k) (n >= 2, k >= 0) is the number of non-crossing connected graphs on n nodes on a circle, having k interior faces. Rows are indexed 2,3,4,...; columns are indexed 0,1,2,....at n=41A089434
• Expansion of 1/2 * (((1 + 2*x)/(1 - 2*x))^(3/2) - 1).at n=16A305612