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v[1] = 121 + 792*x + 729*x^2; for(n = 1, N, my(i = n + 1); v[i] = ((1331 + (3267*n + 9801)*x + (891*n^2 + 8019*n + 15147)*x^2 + (729*n^2 + 4374*n + 6561)*x^3)*v[i - 1])/(121 + (297*n + 495)*x + (81*n^2 + 324*n + 324)*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-cfc5b48d32898a3e","steps":["reverse","(\u03b8+1)\u00b2"],"edges":["e-9b28f01504767b0f","e-162d373b63d44ba1"],"text":"A038301 \u2192 reverse \u2192 (\u03b8+1)\u00b2"},"headline":"A038301 \u2192 reverse \u2192 (\u03b8+1)\u00b2","chain":null}