209377

Appears in sequences

• a(n) = n! * Sum_{k=0..floor(n/2)} (-k/2)^k / (k! * (n-2*k)!).at n=9A362340
• G.f. A(x) satisfies A(x) = 1 + x*A(x)*abs( 1/A(x)^3 ).at n=11A380711