40970475

Appears in sequences

• a(n) = lcm(1,2,...,2*n) / (n*binomial(2*n, n)).at n=30A068553
• a(n) is the denominator of Catalan-Daehee number d(n).at n=29A344850
• a(n) = A369134(n, n).at n=29A369121