-1725

Appears in sequences

• Expansion of x^3*(x-1)^2*(x+1) / (x^6-3*x^5+3*x^4-x+1).at n=30A135991
• G.f. A(x) satisfies A(x)^2 = A(x^2) + 2*A(x^3).at n=29A377255