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2, x] + (10 + 12*x)*P[n - 1, x]];\nTable[CoefficientList[P[n, x], x], {n, 1, 10}] // Flatten","pari":"P(N) = {my(v = vector(N)); v[1] = 1; v[2] = 13 + 18*x; for(n = 3, N, my(i = n); v[i] = -(9 + 36*x + 36*x^2)*v[i - 2] + (10 + 12*x)*v[i - 1]); 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-ba8de4e02acfb6ca","steps":["basis A013610","basis A013609"],"edges":["e-4aa0aeb00b1923c9","e-169e30e3ff1aab79"],"text":"A091042 \u2192 basis A013610 \u2192 basis A013609"},"headline":"A091042 \u2192 basis A013610 \u2192 basis A013609","chain":null}