330174

Appears in sequences

• a(n) = (9*n + 11)*binomial(n+10, 10)/11.at n=8A056128
• a(n) = ((n+2)/2)*Sum_{k=0..n/2} (Sum_{i=0..n-2*k} (binomial(k+1,n-2*k-i)*binomial(k+i,k))/(k+1)*C(k)), where C(k) is Catalan numbers.at n=15A270724