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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = (-(17*n - 19 + (80*n - 90)*x + (142*n - 156)*x^2 + (112*n - 118)*x^3 + (33*n - 33)*x^4)*v[i - 1] + (9 + 65*x + 174*x^2 + 222*x^3 + 137*x^4 + 33*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-ba196dcd01800741","steps":["basis A013609","x \u21a6 x/(x+1)"],"edges":["e-34478b6712498a37","e-1f69e0ecbb1241e6"],"text":"A113953 \u2192 basis A013609 \u2192 x \u21a6 x/(x+1)"},"headline":"A113953 \u2192 basis A013609 \u2192 x \u21a6 x/(x+1)","chain":null}