819160

Appears in sequences

• a(n) = Sum_{k=0..n} 2^(n-k) * binomial(3*n+1,k) * binomial(3*n-k,n-k).at n=5A385667
• a(n) = Sum_{k=0..floor(n/2)} binomial(k+2,2) * binomial(k,2*(n-2*k)).at n=33A392252