1123264800

Appears in sequences

• a(n) = 4*(2n+1)!/n!^2.at n=13A002011
• a(n) = (n+1)*binomial(n+1,14).at n=14A027774
• Sum of squared terms in rows of triangle A152547: a(n) = Sum_{k=0..C(n,[n/2])-1} A152547(n,k)^2.at n=27A152548
• a(n) = sigma(2*n) * binomial(2*n,n)/2, for n >= 1.at n=13A322185
• a(n) = n*binomial(n, n/2) if n is even otherwise 2^(n-1)*binomial(n-1, (n-1)/2).at n=28A389423