1163381400

Appears in sequences

• Coefficients of Legendre polynomials.at n=14A001800
• a(n) = (2n+1)!/n!^2.at n=14A002457
• First numerator and then denominator of central elements of Leibniz's Harmonic Triangle.at n=29A046212
• Swinging factorial, a(n) = 2^(n-(n mod 2))*Product_{k=1..n} k^((-1)^(k+1)).at n=29A056040
• a(n) = n * binomial(n-1, floor((n-1)/2)) = n * max_{i=0..n} binomial(n-1, i).at n=29A100071
• a(n) = 2^n*binomial((n + 1 + (n mod 2))/2, 1/2).at n=28A242172
• a(n) = A(n) if n is even else a(n) = A(n)*(n-1)/(n+1) with A(n) = ((n-1)!/ floor((n-1)/2)!^2).at n=29A274707
• Expansion of (1 + 2*x)/(1 + 4*x^2)^(3/2).at n=28A331552