1669536

Appears in sequences

• a(n) = binomial(n^2, n+1)/(n-1).at n=4A177788
• a(n) = 6*binomial(n+1,5).at n=29A253945
• a(n) = n*(n+1)*(n+2)*(n+3)*(n^2+3*n+26)/720.at n=30A257200