212469400

Appears in sequences

• Third derivative of Catalan generating function/3!.at n=10A030060
• a(n) = A081537(n)/A081535(n), with a(2) = 1 by convention.at n=26A081538
• a(n) = floor(lcm(1,2,...n)/(1+2+...+n)).at n=26A109922
• Denominator of Sum_{i=1..n} 1/C(2*i,i).at n=13A112098
• Denominators of third-order harmonic numbers (defined by Conway and Guy, 1996).at n=25A124838
• Denominator of Sum_{k=1..n} k*H_{n+k} where H_m = Sum_{i=1..m} 1/i.at n=27A144655
• a(n) = Product_{k = ceiling(n/2)..n-1} A090252(k).at n=14A354758