2260440

Appears in sequences

• a(n) = (n+1)*(2*n+1)*(3*n+1)*(4*n+1).at n=17A011245
• Triangle T(n, k) = (binomial(n,2))! / (k! * abs(k+1 - binomial(n,2))!), read by rows.at n=33A123146
• Triangle T(n,k) represents the coefficients of (x^18*d/dx)^n, where n=1,2,3,....at n=10A223520
• a(n) = 6*binomial(n+1, 6).at n=22A253946