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2, x] + (5 + 8*x)*P[n - 1, x]];\nTable[CoefficientList[P[n, x], x], {n, 0, 9}] // Flatten","pari":"P(N) = {my(v = vector(N + 1)); v[1] = 1; v[2] = 7 + 16*x; for(n = 2, N, my(i = n + 1); v[i] = -v[i - 2] + (5 + 8*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 - 1, v[i])))};\nT(9)","reading":{"first_row":0,"offset":0,"reversed":false,"trim_zeros":"none","regular_triangle":false}}],"derivation":{"root":"n-353fb5a029e4e669","steps":["basis A013609","basis A013611"],"edges":["e-3748e9c6bfc37784","e-f9d1c4fe0a566564"],"text":"A207607 \u2192 basis A013609 \u2192 basis A013611"},"headline":"A207607 \u2192 basis A013609 \u2192 basis A013611","chain":null}