-5491

Appears in sequences

• Expansion of 1/(1-2*x+x^2+2*x^3).at n=16A077942
• Expansion of 1/(1+2*x+x^2-2*x^3).at n=16A077989
• G.f. A(x) satisfies: A(x) = x*exp(A(-x) + A(-x^2)/2 + A(-x^3)/3 + A(-x^4)/4 + ...).at n=18A307365