-6029312

Appears in sequences

• a(n) = -2*a(n-1) + 4*a(n-3), with a(0) = 1, a(1) = -2, a(2) = 4.at n=26A099211
• Expansion of (1-8x^2-24x^3)/((1-2x)^2*(1+2x+4x^2)).at n=18A168054