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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = -(5*n - 7 + (2*n - 3)*x)*v[i - 1] + (12 + 10*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-35bd700768cac55f","steps":["basis A007318","x \u21a6 x+1"],"edges":["e-01d2a4c51ed4f80c","e-b21d60e106708637"],"text":"A103633 \u2192 basis A007318 \u2192 x \u21a6 x+1"},"headline":"A103633 \u2192 basis A007318 \u2192 x \u21a6 x+1","chain":null}