878850700

Appears in sequences

• a(n) = binomial(2*n+1,n)*(n+1)^2.at n=12A002544
• a(n) = (2n+4)!/(4!*n!*(n+1)!).at n=11A002803
• a(n) = C(n+2,2)*C(n,floor(n/2)).at n=24A107231