351841

Appears in sequences

• Numerator of fraction equal to the continued fraction [0,2,4,...2n].at n=6A036242
• Antidiagonal triangle sequence based on recursion: f(n,a)=a*n*f(n-1,a)+f(n-2,a).at n=43A173003
• Bisection of A006950 (the even part).at n=36A233758
• Triangle read by rows: T(n,k) = K(n,1)*I(k,1) - (-1)^(n+k)*I(n,1)* K(k,1), where I(n,x) and K(n,x) are Bessel functions; 0<=k<=n.at n=37A246658