2309467

Appears in sequences

• Expansion of (2/(3*sqrt(1-4*z)-1+4*z))*((1-sqrt(1-4*z))/(2*z))^k with k=8.at n=9A172065
• a(n) = Sum_{k=0..n} (-1)^k * binomial(3*n-k-1,n-k).at n=9A371813