-310572

Appears in sequences

• A signed variant of the Motzkin numbers.at n=16A166587
• Expansion of (1+x+sqrt(1-2x-3x^2))/2.at n=17A168051
• Expansion of (1 - x + sqrt(1 - 2*x - 3*x^2))/2 in powers of x.at n=17A292440