-233510

Appears in sequences

• E.g.f. B = B(x,y) satisfies: A^2 + B^2 + C^2 = 1 + y^2 and A^3 + B^3 + C^3 = 1 + y^3, where functions A = A(x,y) and C = C(x,y) are described by A278885 and A278887, respectively.at n=90A278886
• Central terms of triangles A278886 and A278887: a(n) = A278886(n,n) = A278887(n,n+1) for n>=0.at n=9A278889