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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = (-(26*n - 38 + (121*n - 159)*x + (209*n - 249)*x^2 + (159*n - 173)*x^3 + (45*n - 45)*x^4)*v[i - 1] + (32 + 172*x + 369*x^2 + 395*x^3 + 211*x^4 + 45*x^5)*deriv(v[i - 1], x))/(2*n + 4*n*x + 2*n*x^2)); v};\nrow(n, p) = {my(c = Vecrev(p)); c};\nT(N) = {my(v = P(N)); concat(vector(#v, i, row(i - 1, v[i])))};\nT(9)","reading":{"first_row":0,"offset":0,"reversed":false,"trim_zeros":"none","regular_triangle":false}}],"derivation":{"root":"n-c2b7c74f8491f01b","steps":["x \u21a6 x+1","x \u21a6 x/(x+1)"],"edges":["e-1b36e9a96cf70567","e-d46f7b620244b141"],"text":"A207824 \u2192 x \u21a6 x+1 \u2192 x \u21a6 x/(x+1)"},"headline":"A207824 \u2192 x \u21a6 x+1 \u2192 x \u21a6 x/(x+1)","chain":null}