644952073662
domain: N
Appears in sequences
- Number of dissections of an n-gon, rooted at an exterior edge, asymmetric with respect to that edge.at n=24A000150
- a(n) = C_n / 2 if n is even or ( C_n + C_((n-1)/2) ) / 2 if n is odd, where C = Catalan numbers (A000108).at n=23A007595
- a(n) = ((2n+1) + (2n-1) - 1)!/((2n+1)!*(2n-1)!).at n=12A065097
- Number of plane trees with n edges and having an odd number of leaves.at n=23A071684
- Number of plane trees with even number of leaves.at n=23A071688
- Catalan numbers halved and rounded to the next integer.at n=24A130380
- Even Catalan numbers divided by 2.at n=19A152671
- Largest proper divisor of the Catalan number A000108(n).at n=22A152766
- Half-convolution of Catalan sequence A000108 with itself.at n=23A201204
- a(n) = binomial(2*(n+1),n) * gcd(n,2)/(2*(n+1)).at n=23A234040
- Number of ordered rooted trees with n nodes, most of which are leaves.at n=24A358585
- Number of ordered rooted trees with n nodes, at least half of which are leaves.at n=24A358586