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+ (2*n + 2)*x^4)*P[n - 2, x] - ((2*n + 2)*x + (n^2 - n + 2)*x^2 - (n^2 - 2*n + 3)*x^3 - (3*n - 1)*x^4 - 2*x^5)*D[P[n - 2, x], x] + (5*n + 2 + (2*n^2 + n + 10)*x + (5*n + 1)*x^2 + 2*x^3)*P[n - 1, x] + (n*x - (n - 2)*x^2 - 2*x^3)*D[P[n - 1, x], x])/(n + 2*x)]];\nTable[CoefficientList[P[n, x], x], {n, 1, 10}] // Flatten","pari":"P(N) = {my(v = vector(N)); v[1] = 16 + 20*x + 4*x^2; v[2] = 60 + 156*x + 76*x^2 + 8*x^3; for(n = 3, N, my(i = n); v[i] = (-(6*n + 6 + (4*n^2 + 2*n + 10)*x + (n^3 + n^2 + 9*n - 3)*x^2 + (3*n^2 + 2*n + 3)*x^3 + (2*n + 2)*x^4)*v[i - 2] - ((2*n + 2)*x + (n^2 - n + 2)*x^2 - (n^2 - 2*n + 3)*x^3 - (3*n - 1)*x^4 - 2*x^5)*deriv(v[i - 2], x) + (5*n + 2 + (2*n^2 + n + 10)*x + (5*n + 1)*x^2 + 2*x^3)*v[i - 1] + (n*x - (n - 2)*x^2 - 2*x^3)*deriv(v[i - 1], x))/(n + 2*x)); v};\nrow(n, p) = {my(c = Vecrev(p)); c};\nT(N) = {my(v = P(N)); concat(vector(#v, i, row(i, 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