2690416

Appears in sequences

• Related to coefficient of m in Jacobi elliptic function cn(z, m).at n=8A002754
• 1 + Sum_{n >= 1} Sum_{k = 0..n-1} (-1)^n*T(n,k)*y^(2*k)*x^(2*n)/(2*n)! = JacobiCN(x,y).at n=29A060627
• Convolution of 3^n and floor(n/2).at n=15A097137
• E.g.f. A(x,k) satisfies: sn(A(x,k), k) = k * sn(x,k), where sn(,) and cn(,) are Jacobi Elliptic functions.at n=65A291527