-7620480domain: ZAppears in sequencesTriangle T(n, k) = (-1)^n*(k+1)!*(n-k+1)!*binomial(n+2, k+2)*binomial(n+2, n-k+2) read by rows.at n=29A176861Triangle T(n, k) = (-1)^n*(k+1)!*(n-k+1)!*binomial(n+2, k+2)*binomial(n+2, n-k+2) read by rows.at n=34A176861a(n) = (2*n)! * [x^(2*n)] (-x/(1 - x))^n/((1 - x)*n!).at n=5A295383