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2, x] + (6 + 3*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] = 64 + 69*x + 18*x^2; v[2] = 373 + 600*x + 315*x^2 + 54*x^3; for(n = 2, N, my(i = n + 1); v[i] = -v[i - 2] + (6 + 3*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-dfab35176bd08e72","steps":["basis A013610","basis A007318"],"edges":["e-77ee9774535f66a4","e-a72f5c9139479c7f"],"text":"A207606 \u2192 basis A013610 \u2192 basis A007318"},"headline":"A207606 \u2192 basis A013610 \u2192 basis A007318","chain":null}