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(6*n^2 + 12*n)*x + (9*n^2 + 9*n)*x^2)*P[n - 1, x])/(2 + 3*n*x)]];\nTable[CoefficientList[P[n, x], x], {n, 0, 9}] // Flatten","pari":"P(N) = {my(v = vector(N + 1)); v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = ((4*n + (6*n^2 + 12*n)*x + (9*n^2 + 9*n)*x^2)*v[i - 1])/(2 + 3*n*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-cb5d49e71e46f2ed","steps":["basis A013610","\u03b8+1"],"edges":["e-542183e09dec6678","e-3d730a3e290a8e91"],"text":"A196347 \u2192 basis A013610 \u2192 \u03b8+1"},"headline":"A196347 \u2192 basis A013610 \u2192 \u03b8+1","chain":null}