-2270

Appears in sequences

• Bessel polynomial {y_n}'(-2).at n=4A065707
• a(n) = Sum_{k=0..floor(n/3)} (-1)^k * binomial(n-1-2*k,n-3*k) * binomial(2*k,k).at n=20A360314
• G.f. satisfies A(x) = 1 + x/A(x)^3*(1 + 1/A(x)).at n=4A364398