13072764

Appears in sequences

• INVERTi transform of central trinomial coefficients (A002426).at n=20A007971
• Expansion of 1 - x - sqrt(1 - 2*x - 3*x^2) in powers of x.at n=20A126068
• Expansion of 2 - x - sqrt(1-2x-3x^2).at n=20A168055