-5912

Appears in sequences

• a(n) = -2*a(n-1) + a(n-2) + a(n-3), a(0) = -1, a(1) = 3, a(2) = -9.at n=10A321173
• Expansion of e.g.f. exp(x)^( cos(x) - sin(x) ).at n=9A354546