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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = (2*n - 1 + (n - 1)*x)*v[i - 1] - (6 + 7*x + 2*x^2)*deriv(v[i - 1], x)); 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-ff270bcb802a85af","steps":["\u03b3 (scale 1/2) (shift +1)","x \u21a6 x+1","x \u21a6 x+1"],"edges":["e-977fc5754e9861fd","e-6d784857f6230dda","e-3859d1596056018d"],"text":"A008292 \u2192 \u03b3 (scale 1/2) (shift +1) \u2192 x \u21a6 x+1 \u2192 x \u21a6 x+1"},"headline":"A008292 \u2192 \u03b3 (scale 1/2) (shift +1) \u2192 x \u21a6 x+1 \u2192 x \u21a6 x+1","chain":null}