152950

Appears in sequences

• Expansion of 1/(1-4*x)^(19/2).at n=4A020930
• G.f.: Sum_{n>=0} [Sum_{k=0..n} C(n,k)^2*x^k]^2 * x^n.at n=10A180717
• a(n) = 840*(2*n)!/((n + 4)!*n!).at n=13A348893
• a(n) = 15120*(2*n)!/(n!*(n + 5)!); super ballot numbers, row 4 of A135573.at n=13A348898