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v[1] = 1; v[2] = 5 + 4*x; for(n = 3, N, my(i = n); v[i] = (5 + 14*x + 9*x^2)*v[i - 2] + (6 + 18*x + 16*x^2 + 4*x^3)*deriv(v[i - 2], x) + (3 + 10*x + 11*x^2 + 4*x^3)*deriv(deriv(v[i - 2], x), x) + (5 + 4*x)*v[i - 1] - (2 + 6*x + 4*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, v[i])))};\nT(10)","reading":{"first_row":1,"offset":1,"reversed":false,"trim_zeros":"none","regular_triangle":false}}],"derivation":{"root":"n-3cb22164e2f83fe1","steps":["(\u03b8+1)\u00b2","x \u21a6 x+1"],"edges":["e-72cd2be7747bf330","e-f473aafa044aef16"],"text":"A008277 \u2192 (\u03b8+1)\u00b2 \u2192 x \u21a6 x+1"},"headline":"A008277 \u2192 (\u03b8+1)\u00b2 \u2192 x \u21a6 x+1","chain":null}