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v[1] = 2; v[2] = 5 + 3*x; for(n = 2, N, my(i = n + 1); v[i] = (1 - x - x^2)*v[i - 2] - (x + x^2)*deriv(v[i - 2], x) + (2 + 2*x)*v[i - 1] + (1 + x)*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-3cb22164e2f83fe1","steps":["\u03b8+2 (shift +1)","x \u21a6 x+1"],"edges":["e-4ce9900b2631a004","e-0a406e2d3e1f653c"],"text":"A008277 \u2192 \u03b8+2 (shift +1) \u2192 x \u21a6 x+1"},"headline":"A008277 \u2192 \u03b8+2 (shift +1) \u2192 x \u21a6 x+1","chain":null}