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v[1] = 1; for(n = 2, N, my(i = n); v[i] = ((4*n^2 + 2*n + (17*n^2 + 4*n)*x + (26*n^2 - 4*n - 4)*x^2 + (17*n^2 - 12*n - 8)*x^3 + (4*n^2 - 6*n - 4)*x^4)*v[i - 1] - ((2*n + 1)*x + (10*n + 5)*x^2 + (18*n + 9)*x^3 + (14*n + 7)*x^4 + (4*n + 2)*x^5)*deriv(v[i - 1], x))/(n^2 + n - 2 + (2*n^2 + 2*n - 4)*x + (n^2 + n - 2)*x^2)); v};\nrow(n, p) = {my(c = Vecrev(p)); c};\nT(N) = {my(v = P(N)); concat(vector(#v, i, row(i, v[i])))};\nT(10)","reading":{"first_row":1,"offset":1,"reversed":false,"trim_zeros":"none","regular_triangle":false}}],"derivation":{"root":"n-a2304b34e998691c","steps":["x \u21a6 x+1","x \u21a6 x/(x+1)"],"edges":["e-1067be4ea4032d33","e-0766579e05698f97"],"text":"A062145 \u2192 x \u21a6 x+1 \u2192 x \u21a6 x/(x+1)"},"headline":"A062145 \u2192 x \u21a6 x+1 \u2192 x \u21a6 x/(x+1)","chain":null}