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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = ((16*n^3 - 28*n + 12 + (12*n^3 + 24*n^2 - 67*n + 26)*x + (24*n^2 - 22*n + 7)*x^2 + (12*n - 10)*x^3)*v[i - 1] - ((8*n^2 + 8*n - 6)*x + (8*n^2 + 24*n - 10)*x^2 + (16*n + 4)*x^3 + 8*x^4)*deriv(v[i - 1], x))/(4*n^3 - 4*n^2 - n + 1 + (8*n^2 - 14*n + 5)*x + (4*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 - 1, v[i])))};\nT(9)","reading":{"first_row":0,"offset":0,"reversed":false,"trim_zeros":"none","regular_triangle":false}}],"derivation":{"root":"n-c30cb06ad75c5e21","steps":["x \u21a6 x+1","D+1"],"edges":["e-67136cef6b741eb8","e-a1c4d43d0a4d70bb"],"text":"A103327 \u2192 x \u21a6 x+1 \u2192 D+1"},"headline":"A103327 \u2192 x \u21a6 x+1 \u2192 D+1","chain":null}