55880

Appears in sequences

• Number of meanders in which first bridge is 5.at n=12A006661
• a(n) = 2662*n - 22.at n=20A157609
• a(n) = Sum_{k=0..n} 2^(n-k) * binomial(n,k) * binomial(3*n+1,k).at n=5A388130